Computer won't boot after trying the cpu on another computer

[Wikced2000]

Hi all.

A friend of mine gave me an Epox 8rda+ board. he had this board for a while and the board failed to work.
I took a look at the board and saw that it had about 6 burned capacitors. I bought new ones and soldered them. everything went well. everything is how it supposes to be. everything looks great. I have 2 Amd Processors. Two 1800 Socket A.
I installed the video card and memory and a PSU. Shorted the Power pins and the system powered on. But then it turned itself off after 10 sec. Tried again and it did it again. I tried to replace the memory and the video card but it didn't helped. until it start working but with no boot. well I didn't know if the other processer I had was good. So I thought to check if the proccesor was good. So i disassembled the cpu from the working computer and install the one the the one that I tried on the epox first. And then it did it again (The board is Gigabyte 7VRXP) it started for 10 sec and turned off by itself. So I install the cpu that was on the 7vrxp from the begining the one that had no problem and it shuts down after 10 sec too.
And after more trials it start working but with no boot.

I stripped it down to Memory, Board, Video Card and Psu. all of these parts are working on another machine. but still nothing in the epox or gigabyte boards

Here is the spec

2 Amd XP 1800
Gigabyte 7vrxp and Epox 8rda+ (replaced its capacitors)
Nvidia Ti4200 and Hercules 8500LE and Radeon 9700 Pro
Kingston and Geil and Twinmos memory
Hec 300 ART PSU
there weren't any burned smells or smothing like that

Played with those combination but nothing help I really confuse now. And asking for your help and opinion on why it happened or something that can help my understand why it doesn't work and what to do to make it work?

One more thing that I need to mention is that the Epox has Port 80 led. When I am powering the system on. It shows FF from the start. I think it a faulty bios. but the Gigabyte board is much more importart because it worked and worked well for 3 and half years.

 

[Malak]

My guess is that your Epox board was dead, and your trying to fix it did not in fact fix it, and in fact killed both your procs. I'd suggest not trying to fix mobos in the future.

 

[Wikced2000]

I think you are wrong. Like I said above.

I have 2 processors one was on the PC and worked and the other I didn't use it.
After trying processor no. 2 on the epox I thought something was wrong with it. So I disassembled the working machine and tried the cpu. when it did the same thing I thought something was bad with the CPU. So I returned the cpu that worked and it did the same problem. The processer that worked never was on the Epox I didn't tried it there, So if it wasn't on the Epox motherboard it couldn't get hurt.

Look I fixed a lot of motherboards. Capacitor costs 50 cent +- and it fixes a lot of boards that used cheap ones. Instead of buying a new one you first spend about 2-3$ on capacitors and if it doesn't work then you know that the board is dead. works you saved 70-150$ didn't worked you lost 2-3$.

 

[FlyingPenguin]

Replacing the caps is no guarantee. Once the caps have actually leaked the damage could already be done. Mobo regulator could have been damaged or something else.

 

[Wikced2000]

I know that if I change the capacitors it doesn't mean that it will 100% work.
I am not talking about the Epox board.
I am talking about the 7VRXP board. why it doesn't want to boot up. I didn't plug the proceesor that worked on the epox. I just connected the one that was on the Epox on the Gigabyte and then when it didn't worked I reinstall the processor that was on it in the begening.

any more ideas?
Thanks

 

[Wikced2000]

I have an update.

I took my processor to my friend's house and open his computer. He has there Epox 8k9a2. I connected my cpu and it didn't even got power and I heard some kind of an alarm.

Is it happned to everyone in here?

 

[Malak]

Your proc is dead.