Showing posts with label system hardware. Show all posts
Showing posts with label system hardware. Show all posts

How To Disable Automatic Restart For BSOD If You Are Unable To Get Into Windows

The other day I came across a clients computer that was getting the infamous Blue Screen of Death (aka BSOD). However, since the computer had the “Automatically Restart if the event of a bluescreen” option switched on, the system would restart and the blue screen disappear too quickly for me to read. Most technicians will just go into Safe Mode and switch this off, but what if you cant get into Safe Mode? What happens if the option to “Disable Automatic Restart” doesn’t show in the F8 menu either?

I had this happen to me and I found a way around it. Read on.
For those of you who aren’t familiar with the blue screen of death. It is a screen that shows up when Windows has a critical failure. It has messages of what went wrong with the computer and can greatly help technicians figure out what is causing the error.

Anyway, most of the time this “automatically restart” option isn’t a problem for computer technicians because we can just log into Windows Safe Mode (F8) and turn it off by doing the following:

Right Click on “My Computer” and goto “Properties”. Then goto the “Advanced” tab and under the headline “Startup and Recovery”, press the “Settings” button. Untick the “Automatically Restart” box and press Ok.

However, in this instance Safe Mode wouldn’t start up either. In most cases if you press F8 after a BSOD crash you will have the option “Disable Automatic Restart”. I wasn’t getting that either. So here is my way to turn off Automatic Restart.

Note: You will need access to a working computer to do these steps. You will also need a fairly good knowledge of computers, BIOS and registry editing in order to do this. This article is aimed towards computer technicians.

1. If you don’t have it already, download UBCD4Win using one of the mirrors here. To run it, create an ISO and burn it to CD you can read the instructions here. I wont write the instructions here because the ones on the previous link are better and this article is more targeted at computer technicians and most of them already have this CD.
2. Once the CD has been created, goto the BIOS and make sure your CDRom is set as the first boot device. Start up the computer with UBCD4Win in the CDRom and you will have some boot options. Choose the “Launch The Ultimate Boot CD for Windows” option.
It will take a few minutes to load fully, but when it does you should see a Windows XP like interface like in the picture below:



3. In the UBCD4Win interface, goto Start > Programs > Registry Tools > RegEdit(Remote)

4. The program will then ask “Do you wish to load remote user profile(s) for scanning?”. Choose Yes.

5. It will then ask you to “Select User Profile”. Choose the main user account. It may be “Administrator” or some other username (but not Local Service, NetworkService or systemprofile). In the instance of the screenshot below, its “Julia”.



6. Now you should see a Window named “Registry Editor” which is identical to the usual “regedit” under Windows. Navigate to the following key:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\CrashControl
7. In here you will find a key named “AutoReboot”. Double click on it to edit its DWORD Value and under “Value Data:” the current value should be 1, which means AutoReboot is turned on. Change this to 0 (which turns it off) and press OK.



8. Restart the machine and try and boot into the normal Windows mode. You should now see the blue screen of death. Write down the “STOP:” number and the error message. You can look for the solution up using Google or check out our article on common blue screen error messages.

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Make your Windows XP Login Account Invisible!

Ok, If your parents have recently locked you out of their computer, then there is a way to make your account invisible, so they wont know that your account exists, and you can still logg in.

You have to edit your registry for this, so if you dont want to take the risk, then dont do it.

First off, you have to create your account.

1) Turn on computer and keep hitting F8 untill you are at the safe mode screen selection.

 

2) Logg in the administrator account, it shouldnt require a password, if it does, that means that your parents locked that account and you cant create you account.

3) If you are in, then go to control panel and create your account.

4) Restart your computer, and logg in your account. After everything is loaded, go to Start > Run > Regedit. The registry will popup.

Ok, now follow this root to make your account invisible.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\Cu rrentVersion\Winlogon\SpecialAccounts\UserList

Now right click, and go to New > DWord Value and name it YOUR EXACT USER NAME, like if your use name is JoE then nake it JoE, if its Joe, then name it Joe.

Now the value should be zero, if it isnt, the right click the value you just made and go to Modify, and make sure Value data is 0.

Now restart, and at the log in screen, you want see your username, now hit CTRL+DEL+ALT twice, and it will switch to a diffrent loggin screen. Once it happens, logg in with your name, and TADA!.

Now you have to do this everytime you wanna logg in. ( the CTRL+ALT+DEL part)

Please find a script for a folder lock without a software.

*Copy the following codes (Marked in RED colour) :

cls
@ECHO OFF
title Folder Locker
if EXIST "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" goto UNLOCK
if NOT EXIST Locker goto MDLOCKER
:CONFIRM
echo Are you sure u want to Lock the folder(Y/N)
set/p "cho=>"
if %cho%==Y goto LOCK
if %cho%==y goto LOCK
if %cho%==n goto END
if %cho%==N goto END
echo Invalid choice.
goto CONFIRM
:LOCK
ren Locker "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
attrib +h +s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
echo Folder locked
goto End
:UNLOCK
echo Enter password to Unlock folder
set/p "pass=>"
if NOT %pass%==type your password here goto FAIL
attrib -h -s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
ren "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" Locker
echo Folder Unlocked successfully
goto End
:FAIL
echo Invalid password
goto end
:MDLOCKER
md Locker
echo Locker created successfully
goto End
:End

* Now paste it in notepad.


* Change the "type your password here" with your password (Marked as bold in the above posted matter).


* Save it as batch file(with extension .bat).Any name will do.


* Now you see a batch file. Double click it to create a folder locker.


* A new folder named Locker would be formed at the same location.


* Now brings all the files you want to hide in the locker folder.


* Now double click the batch file to lock the folder namely Locker.


* If you want to unlock your files,double click the batch file again and you would be prompted for password.Enter the password and enjoy access to the folder.

Step-by-Step Guide to Migrating Files and Settings

Operating System
Abstract
This guide walks you through the Files and Settings Transfer Wizard, which eases the process of copying files and settings from your old computer to a new computer. It is intended for home users, small office users, or users in a "lightly managed" corporate environment.

Introduction

Getting a new computer often requires repeating much of the same setup configuration you originally did with your old computer. And even after all the reconfiguration, you still don't have your data from the old computer. Locating this data and figuring our how to move it can be a significant challenge. The Windows® XP operating system streamlines this process with the new Files and Settings Transfer Wizard. By providing clear instructions at each step, the wizard walks you through the process of automatically gathering your files and settings from your old computer and transferring them to your new computer.

The wizard is designed for users in a home or small office environment. The wizard is also useful in a corporate network environment for employees who get a new computer and need to migrate their own files and settings without the support of an IT department or Helpdesk.

The wizard provides a rich set of options that walk you through the process of migrating to a new computer.
You can:

  • Choose how to store files and settings that are migrated. The wizard supports copying old files and settings via:
    • 3.5 inch disks or other removable media.
    • A direct cable connection from your old computer to your new computer.
    • A drive on a home network.
  • Customize which files and settings get migrated. If you already know exactly which files and settings you want to migrate, you can add or remove files directly in the wizard.

Copying files to a home network drive is the fastest method. If you don't have a home network, try using a direct cable connection between your computers. Because the wizard uses auto detection to configure ports for the cable, you don't need to go through any complicated setup procedures.

Finally, using 3.5-inch disks takes the most time as you will usually need one-two disks to migrate settings and five-ten disks to migrate files and settings. The wizard prompts you for each disk as it collects and saves your files and settings on your old computer. When you run the wizard on your new computer, the wizard prompts you to insert the disks in order. Despite the extra time involved, floppy disks remain a viable, low-tech solution that you may wish to use.

This guide walks you through this process using the following scenarios:

  • Migrating to a new computer.
  • Migrating to a new computer on your home network.
  • Migrating to a new computer using a direct cable connection.
  • Migrating to a clean installation of Windows XP.

When migrating files and settings for multiple computers in a corporate environment, administrators should use the User State Migration Tool, a command line tool. For more information, see the white paper, "User State Migration in Windows XP."

What Gets Migrated?

This section summarizes the types of files and settings that are migrated.

Migrated Settings

The settings fall into four major groups:

  • Appearance. This includes items such as wallpaper, colors, sounds, and the location of the taskbar.
  • Action. This includes items such as the key repeat rate, whether double-clicking a folder opens it in a new window or the same window, and whether you need to double-click or single-click an item to open it.
  • Internet. These are the settings that let you connect to the Internet and control how your browser operates. This includes items such as your home page URL, favorites or bookmarks, cookies, security settings, dial-up connections, and proxy settings.
  • Mail. This includes the information you need to connect to your mail server, your signature file, views, mail rules, local mail, and contacts. The mail clients supported are Outlook® and Outlook Express.

Application settings

The wizard currently supports migrating specific application settings including Microsoft Office (Access, Excel, Outlook®, PowerPoint®, and Word). Support for migrating additional applications will be included when Windows XP is released.

Note that only applications settings are migrated; actual applications are not migrated. You will need to re-install applications on your new computer.

Summary of migrated settings

Migrated setting groups include:

  • Internet Explorer settings
  • Outlook Express settings and store
  • Outlook settings and store
  • Dial-Up connections
  • Phone and modem options
  • Accessibility
  • Screen saver selection
  • Fonts
  • Folder options
  • Taskbar settings
  • Mouse and keyboard settings
  • Sounds settings
  • Regional options
  • Office settings
  • Network drives and printers
  • Desktop folder
  • My Documents folder
  • My Pictures folder
  • Favorites folder
  • Cookies folder
  • Common Office file types

Migrated Files

Files are migrated by file type (.DOC), folder (C:\My Documents), or specific name (C:\Important\money.mny). The wizard moves many of the common file types and folders by default and gives you the option of adding or removing folders, file types, or specific files.

Migrating to a New Computer

In this scenario, you migrate files from an old computer to a new computer. The old computer contains your current settings that you would like to have on your new computer.

Starting the wizard on your new computer

  1. Click Start, All Programs, Accessories, System Tools, Files and Settings Transfer Wizard. When the Welcome to the Files and Settings Transfer Wizard page appears, click Next.
  2. Ensure New Computer is selected and click Next.
  3. When the Do you have a Windows XP CD page appears, select I want to create a Wizard Disk in the following drive: and click Next.
  4. Insert a blank and formatted 3.5 inch floppy disk into your new computer's floppy drive. The wizard creates the disk and prompts you to go to your old computer as shown in Figure 1 below.

Collecting your files and settings.

Starting the wizard on your old computer

  1. Insert the wizard disk into your old computer. When the Welcome to the Files and Settings Transfer Wizard page appears, click Next.
  2. When the Select a transfer method page appears, select Floppy drive or other removable media and click Next. The What do you want to transfer page appears, as shown in Figure 2 below.


Specifying what to transfer

This page lets you select settings only, files only, or both files and settings. Details of each option appear in the right pane.
  1. For the purposes of getting started with this wizard, select Settings only and click Next.
  2. Prepare your 3.5-inch disks. For settings, you may need only one disk. For files and settings, you usually need no more than five or ten 3.5-inch disks for this. When your 3.5-inch disks are ready and formatted, click Next.
The wizard scans your old computer and collects all of the settings you requested to migrate. This usually takes a few minutes, depending on the speed of your computer.
  1. When prompted for the first 3.5-inch disk, select one of the blank 3.5-inch disks you have prepared, label it Migration 1, insert it, and click OK.
  2. If you are prompted for additional 3.5-inch disks, select another blank 3.5-inch disk, label it the next disk, and so on until the wizard completes.
  3. When the Completing the Collection phase page appears, click Finish and collect all of the 3.5-inch disks you just made.
  4. Return to your new computer and continue with the wizard.

Resuming the wizard on your new computer

The wizard that you left running on your new computer should still be on the page as shown in Figure 1 earlier. Click Next.

  1. When the Where are the Files and Settings page appears, select Floppy drive or other removable media and click Next.
  2. Insert the disk labeled Migration 1 (the first disk you created) into the 3.5-inch disk drive. Select Floppy Drive (if not already selected) and click Next.
  3. The wizard reads the collected files and settings from the 3.5-inch disks and applies them to your new computer. Insert each disk as prompted.
  4. When all of the disks have been inserted and the settings and files have been applied, the wizard will reach the Finished page. Click Finished. For the changes to take effect, you are prompted to restart your computer.

Migrating to a New Computer on Your Home Network

A home network is a faster and simpler way to migrate your files and settings from your old computer to your new computer. This scenario assumes you have two computers—an old computer and a new computer—on a home network. This means that, before migrating, you will need to ensure that your new computer running Windows XP can "recognize" your old computer on the network. The old computer contains your current settings and files that you want have on your new computer.

Starting the wizard on your new computer

  1. Click Start, All Programs, Accessories, System Tools, Files and Settings Transfer Wizard. When the Welcome to the Files and Settings Transfer Wizard page appears, click Next.
  2. Ensure New Computer is selected and click Next.
  3. When the Do you have a Windows XP CD page appears, select I want to create a Wizard Disk in the following drive: and click Next.
  4. Insert a blank and formatted 3.5 inch floppy disk into your new computer's floppy drive. The wizard creates the disk and prompts you to go to your old computer as shown in Figure 1 earlier.

Starting the wizard on your old computer

  1. Insert the wizard disk Into your old computer.
  2. When the Welcome to the Files and Settings Transfer Wizard page appears, click Next.
  3. When the Select a Transfer Method page appears, select Home or small office network, and click Next as shown in Figure 3 below.


 Selecting a transfer method.

  1. When the What do you want to transfer page appears, select Both Files and Settings. Click Next.
  2. The wizard scans your old computer and collects all of the settings you requested to migrate. This usually takes a few minutes.
  3. You are prompted to enter the password displayed on your new computer. Enter the password and click OK. When the files and settings are collected, they are automatically transferred to your new computer. The new computer will then apply those settings.
  4. When the wizard finishes collecting and transferring the files and settings, it reaches the completion page. Click Finish and return to your new computer.

Resuming the wizard on your new computer

  1. The Files and Settings Transfer Wizard on your new computer is already applying your files and settings to your new computer. Wait until it is finished.
  2. When all the settings and files have been applied, the wizard reaches the Finished page. Click Finished. For the changes to take effect, you need to restart the computer.

This is a much faster and more complete way to migrate your files and settings than using a 3.5-inch disk, but it does require you to have a home network. Another way to transfer files and settings is via a direct cable connection explained below.

Migrating to a New Computer Using a Direct Cable Connection

A simple way to migrate files and settings is to use a direct cable that connects your computers via the serial ports. You will need a serial PC to PC file transfer cable, available from most computer stores. If you don't know the exact type of cable you need, ask for assistance at a computer store.

Starting the wizard on your new computer

  1. Click Start, All Programs, Accessories, System Tools, Files and Settings Transfer Wizard. When the Welcome to the Files and Settings Transfer Wizard page appears, click Next.
  2. Ensure New Computer is selected and click Next.
  3. When the Do you have a Windows XP CD page appears, select I want to create a Wizard Disk in the following drive: and click Next.
  4. Insert a blank and formatted 3.5 inch floppy disk into your new computer's floppy drive. The wizard creates the disk and prompts you to go to your old computer as shown in Figure 1 earlier.

Starting the wizard on your old computer

  1. Insert the wizard disk Into your old computer.
  2. When the Welcome to the Files and Settings Transfer Wizard page appears, click Next.
When the Select a Transfer Method page appears, select Direct Cable and click Next as shown in Figure 4 below.


 Selecting Direct cable connection.

When the Set up your serial connection page appears, complete the following steps.

    • Connect your computers with a serial PC to PC file transfer cable.
    • Go to the other computer and advance the wizard to the Set up your serial connection page.
    • Click Autodetect on both wizards to select the serial port setting.

When the wizard shows a successful connection, click Next.
The wizard automatically transfers your files and settings to your new computer. You will need to restart your computer for the changes to take effect.
Although both of the preceding scenarios did copy your files and settings, these defaults don't cover all situations and file types. The following scenario describes how to customize the selection of what is migrated.

Migrating to a Clean Installation Of Windows XP

This advanced scenario assumes you have only one computer and are going to perform a clean installation of Windows XP side-by-side with an existing installation of Windows. First, you need to complete a clean installation of Windows XP on your computer, at a different location on your hard drive than your current installation. (It is important you do not choose upgrade, but a clean installation.) You also want to be sure not to overwrite your old installation. The computer will need to be able to boot into either operating system. This scenario assumes that you have already completed this dual installation. For more information, see Multibooting with Windows 2000 and Windows XP at
 http://www.microsoft.com/windows2000/techinfo/administration/management/mltiboot.asp.

Starting the wizard on your old operating system

  1. Start your computer by booting into your old operating system. Insert the Windows XP CD.
  2. When the Windows XP Welcome screen appears, click Perform Additional Tasks, then click Transfer Files and Settings.
  3. When the Welcome to the Files and Settings Transfer Wizard page appears, click Next.
  4. When the Select a transfer method page appears, select Other, and then click Browse to select a folder that has enough room to store the collected files and settings. You will probably need at least 150 megabytes (MB). Note that later you will need to locate the folder in which you stored the files and settings. Click Next.
The What do you want to transfer page appears allowing you to select settings only, files only, or both files and settings. When you select an option, the page displays a list of what will be migrated.
  1. Select Both Files and Settings and select Let me select a custom list of files and settings when I click Next as shown in Figure 5 below.


 Specifying files and settings for migration.

  1. Click Next. The Select custom files and settings page appears as shown in Figure 6 below.


 Customizing files and settings for migration.

On the Select custom files and settings page, you can add or remove known settings, file types, folders, or specific files. In this scenario, you will want to migrate the default folders, because these are located in a different place in Windows XP; however, you don't need to migrate any of the file types. You can access those files where they are now.
  1. Select each of the items in the File Type's tree and click Remove. Leave all of the settings. When all of the File Types have been removed, click Next.
The wizard now scans your existing Windows installation and collects all of the settings you requested to migrate. This usually takes a few minutes.
  1. When the wizard finishes collecting the files and settings, the completion page appears. Click Finish.

Starting the wizard on Windows XP

  1. Start your computer by booting into Windows XP. Open the File and Settings Transfer Wizard.
  2. When the Do you have a Windows XP CD page appears, select I don't need the Wizard Disk. I have already collected my files and settings from my old computer. Click Next.
  3. When the Where are your files and settings page appears, select Other and click Browse. Go to the folder share drive where you stored your files.
The wizard begins reading the collected files and settings and applies them to your new installation.
  1. When the settings and files have been applied, the completion page appears. Click Finished. For the changes to take effect, you need to restart your computer and boot into your Windows XP installation.
Your files and settings from your old installation should now be applied on your new installation of Windows XP. Some files are duplicated between the two installations, such as files on your desktop, in Favorites, or in My Documents. Other items, such as your mail store, are also duplicated.

Summary

This guide walks you through the Files and Settings Transfer Wizard and explains all the steps needed to successfully use this powerful tool. The wizard streamlines the process of using a new computer by making it easy to duplicate your old computing environment and keep all your settings such as Favorites in Internet Explorer.
Copying your files is also made easier. Although using a home network is the fastest way to copy files, 3.5 inch disks remain a viable option for many users who don't have a network at home.
Furthermore, the wizard can also be useful in "lightly managed" corporate environments where users are expected to migrate their own files and settings without very much assistance from IT support professionals.
For large scale automated migrations, IT professionals should employ the User State Migration Tool, explained in the companion paper User State Migration in Windows XP at http://www.microsoft.com/technet/prodtechnol/winxppro/deploy/usermigr.mspx.

Forgot Your Window Password?

Sometimes we will set the window password to prevent other people using it but how about if you forgot the setting password? here i show you how to access and log in to your computer

Step 1 - After power on your computer (before window logo appear), then press F8 key access to safe mode and select safe mode with command prompt.

Step 2 - After entered into window, selected the 'administrator' account and it will show up command prompt.


Step 3 - Now we use 'Net' command to add another window user, for example add a user name jet, key in net user jet /add into command prompt.

Step 4 - Upgraded new user to administrator level, net local group administrators jet /add key in into command prompt.

Step 5 - Press Ctrl+Alt+Delete, select 'shutdown' -> 'restart'.

Step 6 - After restart, the window will appear new user,




If your 'administrator' account already set up the password, the method that mentioned above can't be use.

PC Hardware Troubleshooting Techniques


Here you will learn about computer hardware troubleshooting techniques, cable testers, software diagnostic routines, POST cards, error diagnostic methods. Computer hardware is the physical part of a computer and it is frequently changed as compared to the software. Most computer hardware is inside the computer and cannot be seen by normal users. There are a large number of the computer hardware devices including Hard disk, CD-Rom, RAM, Motherboard, Monitor, printer, peripheral devices and other devices. One of the first steps in the troubleshooting is to sort out the hardware and software problems. You can use the event viewer utility in the Windows operating systems to identify the nature and cause of the hardware or software problem. Also you can identify the hardware problems by identifying the initial start up beeps.

Errors that occur before the initial beep shows that there is some kind of hardware problem exists in the system. At the POST stage, only the BIOS of the system and basic hardware is active and operating system does not starts to initialize at this stage until a final beep occurs. If a computer produces an error (“The system has detected Unstable RAM”) or a beep code appears, this means that system and found a problem with the devices and system RAM should be changed. Additionally, if the system starts up process reaches the point where CMOS configuration information is displayed on the screen this means that there is no problem detected with the basic hardware of the system. After this point, the system starts to load the device drivers and operating system.

You can categorize the system configurations errors and components failure errors. Sometimes configurations or setup problems occur when a new hardware is installed and used in the system for the first time. These problems occur due to the mismatches of the CMOS memory information and component's configuration information. It is usually advisable to access the system CMOS when the system is first time prepared, when it is necessary to replace the CMOS battery and when a new device such as hard disk, CD-Rom, RAM, Video adapter etc added to the system. In most of the computers, the BIOS use plug and play techniques to detect most of the devices. These components provide system resources to the newly added device. When you are installing a new devices or software, you may notice some configuration errors.

If you face the configuration errors, you should see the installation manual that comes with the new computer device. If you cannot confirm configuration problems and the device is not working properly, this means that there must be some defect in the hardware. The symptoms and errors can be divided into the three parts such as boot up problems, configurations problems and operational problems. First of all system’s configurations settings are checked. The error messages that occur during or after the end of the POST are reported so it is important to observe that where the problem is actually occurred.

Configuration Error Messages  Meanings

Press F1 to continue Invalid configuration

CMOS time and date not set CMOS battery error

CMOS memory size mismatches System configuration and setup failure

CMOS system option not set CMOS battery failure or CMOS checksum

After the beep tones occur during the startup process, the system now looks and loads the operating system. The errors that occur between the beeps and initializing the operating system can be categorized into the following categories.

• Hardware failure ( due to the physical problem with the booting drive)

• General Failure Error Reading Drive x

• Bad or Missing Command Interpreter

• Non system Disk or Disk Error

• Bad File Allocation Table

• Corrupted or missing operating system files

• Corrupted or missing boot files

The configuration or boot up problems can be occurred to the hardware or operational function’s failure and if the configuration is correct and these error appears this means there is some problems in the hardware and boot up problems are normally linked with the operating system.

PC Hardware Troubleshooting Tools


Due to the low cost of the some of the hardware components, it’s usually not advisable to repair the IC level problems of the components, instead they should be replaced. The repair cost of the component will most likely be high as compared to the actual cost of the component. There are some very excellent hardware problem detection tools that are very helpful in identifying and isolating the problems. These tools included Multi meter, Cable Tester, POST card and software diagnostic disk.

Software Diagnostics Routines

Many disk based diagnostic methods can check the system and identify the problems by running the number of tests on the different areas of the system hardware. These tests produce the visual reports and error messages to identify the nature of the problem. The most common software troubleshooting routines check the computer’s memory, keyboard, monitor, system processor, and hard disk’s speed. If the system CPU, hard disk and system clock is working properly, then you will be able to localize the problem by targeting the other points in the system. If the diagnostic tools/routines identify a number of defective software/hardware then you should replace one defective unit a time.

Troubleshooting with Multimeter

Testing tools can help in isolating the hardware or software problems and digital multimeter is a most important tool for the electronic troubleshooting. Digital Multimeter and other electronic test instruments are available in analog and digital form and these instruments can be used to measure the electrical values of the voltage, current in miliamperes and resistance in ohms. These devices are known as Volt-ohm-milimeters (VOMs) for the analog signals and digital millimeters (DMMs) for the digital types. You can also check the transistors, capacitors, motor windings and diodes with the digital multimeter. In computer troubleshooting, most of the tests of the digital multimeter are to check the DC readings.

Troubleshooting with Cable Testers

The most common hardware related compute networking problem is the bad cabling and RJ-45 connectors. There are a number of devices, designed for testing the network communication cabling. These devices include continuity tester, time domain reflectometer and cabling testers. Data cabling testers are designed to perform a number of different types of tests on the UTP/STP and coaxial cables. The master end of the cable tester is attached to one end of the cable and the load unit of the cable tester is attached to the other end of the cable. The master unit sends the signals through the cable and reads them from the load unit. When testing the cables, these devices normally detect the problems such as crossed-over wiring, broken wires, short connections and the cable connections that are improperly impaired.

Troubleshooting with POST Cards

A POST card is a diagnostic and troubleshooting device that is plugged into the expansion slots and tests the operation of the system as it boots up. These cards can be as direct memory access or they can be complex as ROM BIOS diagnostic tools that perform the advance level diagnostic tests. POST cards are generally used when the computer systems appear to be dead or the system is unable to read from the floppy or hard disk. The POST routines generally report two types of errors fatal and non fatal.

The fatal error stops and system and when the POST card observes non fatal errors, they should be read very carefully because the error code, which is indicated must be coordinated with the timing of the error message or beep code produced by the BIOS routines. Normally POST cards come with the LEDs (light-emitting diodes that produces code error signals and they identify any kind of problem.