Cannot power on supermicro mobo

[ac130]

I got a supermicro X8DTE from ebay with two L5520 xeons pre installed with heatsinks and without fans.

The motherboard powered on quite a few times without a button by just flipping the psu switch when I tested it at my friends house, but I got some memory beep codes so I took it home to put in some power clocked dimms that were to spec with the mobo. But when I was setting it up at home, I took out the cmos battery before plugging in any power cables just to make sure there wasn't a BIOS problem, but I forgot to put it back in and tried to turn it on a few times. Now it doesn't turn on at all, beep or spin the gpu fans like it did at my friend's house.

I tried shorting the power on pin with a ground pin, but to no avail.

Is my BIOS corrupt?

 

[kittle]

Try clearing the CMOS?
according to the manual found here:
http://www.supermicro.com/products/motherboard/QPI/5500/X8DT6-F.cfm?IPMI=Y&SAS=N
you can do that without power plugged in.

Check that the cmos battery is fully seated. According to the manual thats a potential problem when there is no power.

Also - you mentioned there were no fans in the CPU heat sinks. Unless you have some form of active cooling -- fans? Its possible the CPUs got too hot. doubtful with all the protections in current CPUs -- but possible.

Any way you can test the components in another system to see if they are still working?

 

[ac130]

Try clearing the CMOS?
according to the manual found here:
http://www.supermicro.com/products/motherboard/QPI/5500/X8DT6-F.cfm?IPMI=Y&SAS=N
you can do that without power plugged in.

Check that the cmos battery is fully seated. According to the manual thats a potential problem when there is no power.

Also - you mentioned there were no fans in the CPU heat sinks. Unless you have some form of active cooling -- fans? Its possible the CPUs got too hot. doubtful with all the protections in current CPUs -- but possible.

Any way you can test the components in another system to see if they are still working?

No way the CPU's have overheated, at least by me because I never got it to start anyways. They were supposedly tested by the seller. Server heatsinks don't need their own fans because of the really good 'case' fans. Each cpu is only max 60W anyways. I do plan to put fans on them when I get the thing booted at least into bios.

I'm pretty sure the battery is fully seated aswell.

 

[ac130]

Turned out to be a dead CMOS battery. I check the voltage of the battery and found that it was running at 2.9 volts. So I swapped in a working CMOS battery that was running at 3.09 volts. This work and I manage to successfully short power pin and thethe ground pin to turn the system on.