ECS plus Athlon XP 2100 trouble booting

[Sandivar]

Okay, trying to fix my friend's computer. Just wouldn't turn on for her one day.

I troubleshot it to what appears to be a burned out CPU--black all around the middle of the CPU on both the pin side and top side, plus the fan was all clogged with dust.

Bought a used chip (guaranteed working, BTW), but when I put the chip in the same thing happened; namely, the fans start up for a second or so (sometimes just for half a second or less) and then immediately power down. That is the same thing that was happening with the blackened CPU in.

Did I get a bad CPU replacement or is the motherboard fried too? Note: when NO CPU is in, the fans, hard drives, and CDROM all power up.

It's an ECS K7S5A and an Athlon XP 2100+

 

[Captante]

I've had that happen when the motherboards BIOS didn't correctly recognize the cpu, but if the replacement chip is identical to the old one its very likely that the motherboard was damaged when it fried.

Try clearing the CMOS & see what happens, it that doesn't work you should find a way to test the cpu in a "known-good" motherboard to eliminate it as the problem.