Man I've been having a rough day.

Ok, working on a friend's computer that won't power up (this began after a storm, despite having been plugged into a surge protector). It would power up for a second, then turn off (and nothing ever came on screen, just heard fans running momentarily).

So, at first I thought the power supply was out. Swapped out power supplies. No change.

So, that left me to conclude either the motherboard and/or CPU are toast. And thus is where my problem begins.

After fighting all afternoon to remove the heatsink (note my other thread today), I finally got the CPU (AMD Athlon XP 2400) removed. I removed the motherboard from one of my working machines, swapped out my CPU with this one, put the motherboard back in, turned on the computer, and...powers up, then shuts down, nothing on the monitor.

So I figure, ok, CPU's bad, that tells me what I wanted to know. Just to make sure, I tested my control variable by plugging my CPU back into my motherboard and powering back up...same thing! Powers up, then goes off, nothing on the monitor...with my CPU back in!

So what could have possibly happened? Only thing I can figure is that I'm having trouble figuring out how to reconnect the itty bitty cables the run power to the power LED, HDD LED, etc., as there's a lot of them and they're not very descriptively labelled. I figure there's got to be something I didn't do right when I placed my motherboard back in, because I know my mohterboard and my CPU are working just fine...until now!

I am absolutely lost...Help?