Dead Computer - Need help

[Mamacat104]

Good evening,
I'm trying to help a friend with his computer.

120 G Hard drive,
512M DDR Memeor
Amd xp 2600+ CPU
ECS K7S7AG+ Mainboard

When I push the power button, I get nothing..no beeps, no lights, nothing, nada, zilch.. I have changed out the power supply with two others...one that the fan was running on another computer..the other a brand new one... I changed out the CMOS battery trying one from a working computer.. Still nothing.
I don't know if maybe it is a power switch problem or is the motherboard done- gone... needs to be buried.
When I tried the other power supplies, I only plugged in the main connector to the motherboard and the 4pin connector...I left the hard drive unconnected. Nothing.

How can I be sure it is the motherboard. I checked the capacitors on the board.. All of them are clean, flat on top, except 3 near the main connector. These 3 are just slightly puffed on top..not completely flat like the others...but no brown stuff around the base of them. Tiny bit of brown on top like someone barely touched them with a felt tip pen

Help... thanks
appreciate any help you can give me.
have a wonderful evening
Barbara

[chaoticHead]

Hi Barbara, Welcome to the Playground!
You can check the power cable again ( if you haven't changed it with each PSU) and check the wall-plug. are the fans working? if they are, check the CPU heat sink and see if it's hot.
if you think it's a power switch problem, just remove the power switch connectors and try short circuiting the power switch pins on the board with a screwdriver.
if there was an electricity spike problem or something like that, you would probably lose your PSU too, so try the PSU on another system and see if it's working.

[Peter]

Hmmm...the power test fails...

the psu could be too weak, a short circuit is somewhere
or the board is broken

Get the board out of the case on a table, remove cards + memory
and test it again...

...and: Welcome here

[EvLwMn]

IMHO - if you have "puffed" capacitors on the board - the board is dead.

I would still continue with the suggestions above to make sure (i.e. remove board from case - remove all cards, bench test, etc.) but usually if you have capacitors that show any type of malformity - even if they aren't leaking - the board is dead.

Good luck..........and welcome to 8D!

[Toby B.]

burst capacitors can be fixed.... As far as having a functional board afterwards is all dependent on how bad the overall damage to the board is....

http://www.badcaps.com fair prices and quality work from what I hear.