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No display

Trish's Escape from Hardware Hell Help Board » Hardware » Video Related Problems » No display « Previous Next »

Author Message
Dana Richards
Posted on Friday, August 25, 2000 - 5:26 am:   

I switched off my computer in perfect working condition and went and I come back and switch it on with no display. I open the cabinet, and see that there is electricity on the motherboard. The processor fan wasn't working. The CDROM drive was working fine, but not the keyboard(no lights on pressing Num Lock,etc.). After sometime I fiddled around to check maybe if the switch on the CPU has a problem, but no change. Now, when I turn on the computer, at times the CPU fan moves and then stops intermittently. The Display Card display also came but nothing after that. The processor fan's getting hot as well with time as it is switched on. The Cabinet's fan is rotating, and the CDrom ejects as well.
Adam Emswiler (Abe)
Posted on Monday, August 28, 2000 - 1:30 pm:   

This could indicate a few things. My first guess is the power supply is not sending out enough voltage to fully power up the system. In this case the power supply would need to be replaced.

First I would remove all add-in cards from the system to see if there is a problem with one of them. I have seen where a defective modem has caused similar issues.

If that doesn't help, I would disconnect all power from all devices (except motherboard) and disconnect all the drive cables from the motherboard and attempt to boot again.

If you still don't get anywhere, you may have a bad motherboard which will need to be replaced.
Posted on Tuesday, August 29, 2000 - 1:29 pm:   

The problem may be with the following things .

1. The power supply --- > Check for correct voltages with a multimeter . ( REd - +5, Black - Ground, Blue - +12, Yellow -12)

2. Takeout the board from the case, ( Handle with care!!!) Just push the Chips gently, and use some source of compressed air and blow the dust, Then connect only - KBD, Display card, Spkr , ( Keep the CPU and RAM on the board itsef !!)
If no display or beep , get the system board checked.

3. A faulty switch ( you said you checked it )

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