Red light stays on...

April 15, 2009 at 07:57:04
Specs: Microsoft Windows Xp, 2.5GHz / 256MB
I have a old pc which has a old p4 configuration and on the computer case the red light use to blink and the green light use to stay on. and the computer use to work fine.

But today when i turned on my old pc. On the computer case THE RED LIGHT STAYS ON AND GREEN LIGHT IS NOT LIGHTING. no BIOS screen and pc is not booting. and computer is not working.

What could be wrong ?

Plsssss reply
BIG THANKS in advance.

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April 15, 2009 at 08:05:29
Failing power supplies are common and can cause your symptoms.
Check your PS.
They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.
See response 4 in this:

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April 15, 2009 at 08:28:23
Thank you for your reply Tubesandwires
i will replace the psu and give u the feedback soon.
but are u sure that psu is faulty cause red light is lighting but abnormally stay on. so the power is running but not properly I guess.

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April 15, 2009 at 12:39:29
The red light usually indicates hard drive activity. So the problem could be with the hard drive. You might want to disconnect both its data and power cables and then see if the system at least shows a posting screen. If you do get a posting screen the problem is probably due to the drive and not the PSU.

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Related Solutions

April 16, 2009 at 07:47:27
If you can temporarily borrow a known working PS, try connecting that first.
Yes, the red hd activity led lighting up and staying on can indicate a faulty hard drive, but that does NOT cause no boot and no display, and it can also light up and stay on because the hd is not getting enough of one of it's two required voltages (the led requires only one of them) or another problem such as a poor connection of the ram, or if you have been fiddling with the hard drive's data cable, it can be because of an improper connection of the data cable (the connector can sometimes be installed backwards) or a damaged data cable.
If you haven't been fiddling with connections inside the case, the most likely thing is the power supply is failing.

The green led not lighting up is not normal, but it could be it has been displaced from where it is mounted, and it is lighting up but you just can't see it.

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