Huge Problem with new build

[KilluminatiStyle]

I was building this budget system for a friend with the following components:

Athlon XP 2800+
Biostar M7VIZ Ver. 8.0
512MB PMI PC2700

The rest of the components are kind of MOOT.

I put everything together, plugged it in, hit the power button and what do you know.... nothing happend. I didn't start to sweat yet as I knew I could just use PCMECH's hand dandy BYOC guide. Followed the steps... mobo out of the case with only essentials hooked up etc. and when I shorted the power it did something this time... PSU fan and CPU fan came to life... but no video... and a very faint "clicking" noise coming from system speaker. The really strange part is that the power seemed to pulse every second. I thought "must be this crappy PSU that came with the tower." So I dug out my test PSU and tried that. Same results. My next thought was maybe I have a bad processor since it was OEM. So I pulled an Athlon 2600+ from one of my computers and gave that a go.... same thing happend. I thought that I had narrowed the problem down to the MOBO. So I pulled everything except processor from the board and tried to boot again.... waiting to hear that beep for missing RAM. No beeps. Same with Processor... tried to boot without it and no beeps. So by this time I was sure it was the board. Called my friend told him the deal and that was that...... or so I thought.

I stuck my processor back into my computer and fired her up. All seemed well. After a windows update forced a reboot the computer never came back on. Now MY motherboard won't give any error beeps. Nothing... and I get the same pulsing of power. Tried the 2800+ that was going into my friends computer and got the same results.

So, now I'm both very angry and very confused. Can a bad mobo kill a processor or vice versa? Why would everything "seem fine" for 1 startup on MY computer and then nothing? I really need help guys/gals. Any ideas would be appreaciated.

[KilluminatiStyle]

Oh dear lord could it be this simple?!?!

I'm not 100% sure yet but I think the culpret is a combination of both a bad power cable for the power supply and me having just too much stuff plugged in.... I've got my fingers crossed.

[KilluminatiStyle]

It appears as though I was wrong...

I only thought it may have been power issues cause the board actually completed a post with the 2800+ in it.

So now I'm really confused. PLEASE HELP ME!

[Odysseus]

I figured I would post this so that you can reply to this instead of your own posting.

You started breaking things long time ago, started with my lego's.