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Computer starts but does not post Athlon XP KM4M DDR

\015 I have a computer I am working on for a friend. He claims that he brought it to another computer company and they told him it was a dead motherboard. PSU would turn on but no power to the board or fans or anything inside. I tried a new PSU on this board before replacing it. I replace the motherboard and now the computer turns on but does not boot or POST. I have tried a bare start with just the CPU, Fans, RAM plugged in but no luck. I tried swapping the RAM with working RAM, I tried using one stick of RAM, I tried no RAM to see if it would make any beeps. Still nothing. I have swapped the CPU with one that was known to be working. I have tried another PSU that is known to work to see if maybe the old one was getting enough power to run everything. I have taken out the CMOS battery. I have swapped the CMOS battery. I have tried changing the jumper settings(the manual only lists jumper settings for 100-266 Mhz and my CPU's are both 333 Mhz but it came with the 2800+ so I know it is compatible with the board and the board I swapped in was an exact replica of the previous one. The ONLY thing I can think of is that MAYBE, it wasn't the board that was messed up originally, it was the CPU and MAYBE the CPU that I swapped it with(which is from MY previous computer) stop working for some reason but as far as I know it worked fine last I check(the video card in my old computer busted and I got a new computer instead of a new card, so I can't test the old CPU). Does anyone have any ideas? I am thinking of buying a POST card just to have in my tool arsenal and see if that helps at all. Please help before I end up buying a new(old) CPU and waste my money.System specs:MSI KM4M motherboardAthlon XP 2800+(original)Athlon XP 2700+(swapped)2X 512MB ddp pc2700(swapped with same)250w stock PSU(swapped with 600W aftermarket)\015

Answers :

What kind of beep code does it give...
\015\012most MSI motherboards have ami bios.
\015\012check you beep codes here:
\015\012good luck
If the system made no beeps after the machine was booted with no ram its a bad board...sorry
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