Question about Compaq (203966-001) Motherboard

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Replaced motherboard, no signal on monitor

Replaced faulty motherboard with similar one (203966-001) re connected everything and powered up, all fans running but no response on mouse or keyboard. No signal to monitor.

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  • gnk9 Nov 19, 2008

    Many thanks for your help, mouse, keyboard and VGA are all part of motherboard but I will re check all other pieces as you suggested,

    Regards.



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Check the memmory very well remove it and re attach it back if the same then find another ram and see what happend again.

Posted on Nov 20, 2008

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IF THE COMMUNICATION PORT FOR YOUR DEVICE IS NOT UNBOARD THAT IS IF THE KEYBOARD, MOUSE AND YOUR VGA CARD ARE THE REPLACEABLE ONE, TRY TO CHANGE THOSE CARDS THEY MIGHT NOT OK ANY MORE. IF YOU STILL HAVE SAME PROBLEM THEN THE MAINBOARD IS NOT OK, ALSO, YOU CAN CHECK YOU MEMMORY CARD THAT IS RAM IF YOU DON'T ATTACH IT PROPERLY IS CAN CAUSE THE PC NOT TO BOOT. IF IS RAM FAULT YOU WILL BE HEARING SOUND FROM YOUR BOARD, ATTACH IT PROPERLY.

Posted on Nov 19, 2008

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My monitor wont turn on


Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

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even something as small as an electrical fan and its lead can cause this problem or just replace them they could be faulty a computer needs all electrical power and data to continue through every working device and to have an end so any faulty leads will end up with a computer error


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If a second monitor doesn't work or the monitor works on another computer, then the problem is with the video adapter on the computer, the power supply or the power switch. Please add a comment with more information about the type of desktop and the current video graphics adapter (on the motherboard or separate card). I will provide additional help if possible.

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motherboard to hard drive leads

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty or just replace them they could be faulty ?
one bad lead will end with a computer error a computer needs its connections continue its cycle and have an end to function properly

even something as small as an electrical extension or a faulty fan lead can cause this problem computer needs all of the data and electrical current to travel through every device and to have an end to be able work properly

a motherboard and a hard drive any leads between them will fail before your motherboard or your hard drive if its a flat ribbon 40 pin type IDE replace it this will be the first to fail check all electrical extensions make sure they are securely seated even the cd/dvd floppy drives need to have current go through make sure these drives are working

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Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error hope this helps

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One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect your hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them there probably old and faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electic extensions or just replace them they are probably faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error hope this helps
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1 Answer

When i switch on the monitor the on/off button blinks and i don't get a picture. johanalvemalm@people.net.au


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You will probably find that your computer isn't starting up when you turn on the power. A common computer problem is that it will turn on when you press the power button, showing a power light and you'll hear the fans inside start running, but it never actually starts running. Then there's no video to the monitor and you see the trouble you described.

The monitor may still be bad. If everything seems to be starting normally and you hear the Windows startup sound through your speakers, but the display stays blank, try another monitor. If that one works, you'll need to have the bad one serviced or replace it. If the test monitor is also blank, the video circuitry in your computer has failed. If the video is built into the motherboard, you can install a plug-in video card as a replacement.

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No Signal


No signal on screen means that there is no input for your monitor from the PC.

1. There might be problem in your PC or in the cable connected to PC from monitor.
2. Your PC might damage that it could not send signal to the monitor.
2.1 In your Motherboard might be faulty in the VGA chips.
2.2 In your Motherboard's SMPS mean power supply.

I think you can got my point. If you are tech person it will help you, otherwise you should take a tour to any service centre.

Thanks & Goodluck
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