My servers won't post or get into an OS or BIOS

[grimreeper132]

I have 3 IQ9000is, one works fine but the other two aint working right.

 

The first one the fans spin up, power button, and but the test LED button for one of it's cards doesn't work (don't know if its the card or system as I have just bought it), but it won't post. No beeps nothing I left it for a good 5 minutes letting it try to post

The Second one the fans spin up, it posts, power button works, the test LED button works, but as soon as it leaves the post screen it stops working. If I press any button to go to the BIOS, boot menu, etc. or if I just leave it won't do anything and just goes to a blank screen

The third one works fine (as far as I know I still have to boot it into an OS but I believe it works fine as it posts, then it goes into anther screen where it checks all the drives and says it has them all (the second one doesn't get that far either)

 

how can I fix this

 

Things I have tried

1) removing the BIOS battery for the first system only, didn't help (I am about to do it for the second system)

2) turning it off and on again 

3) leaving them for extended periods of time.

4) re installing the RAM (I haven't done it to the CPU yet, but I might try that if that might help)

[Windows7ge]

Try things like less ram, different ram, different slots, remove all unnecessary expansion cards. Unplug all other accessories that aren't needed to check POST & try a different PSU.

 

Beyond that the motherboard might be dead.