Mac Pro wont boot

[TheWaveable]

Hi!

My Mac Pro 2008 wont boot, when I press the Power button I hear a click and if I then press the DIAG button the yellow STBY lights turns yellow. Both the OT lights have also been red once, so I recon it wont boot due to a misreading off the CPU temp? Is it possible that something like that could happen? And if, what do I do to fix it? :/

 

[Macsonic]

It may be a faulty ram stick, though I am not sure. Try troubleshooting by removing some sticks to pinpoint which stick ( if it's ram problem ) Or best to have your Mac Pro checked by an Apple service center for thorough checkup.

 

[TheWaveable]

It may be a faulty ram stick, though I am not sure. Try troubleshooting by removing some sticks to pinpoint which stick ( if it's ram problem ) Or best to have your Mac Pro checked by an Apple service center for thorough checkup.

Shouldn't one of the RAM leds be lit if one of them where faulty?

 

[Raid]

before re-seating the ram what about performing a SMC reset ?

 

[Macsonic]

before re-seating the ram what about performing a SMC reset ?

Thanks Raid for the suggestion. This may help too.

 

[TheWaveable]

Tried SMC reset and have even tried to pull the motherboard battery with no successes :/

what happens is, right after I connect it to power it makes a normal *click* sound, and when I press the DIAG button (before pressing power) it states it's in STBY. If I then press the power button I hear another *click* and nothing happens. I must force it "off" with holding the power button for 5 seconds method.

Must also add that this is a used motherboard and CPUs from ebay. The PSU is brand new. Both the two CPUs and the motherboard should work (as they both have been tested) according to the sellers.