Blank Screen, at a complete loss...

[robucf]

Hi all,

1st post and its a baffling one.

History:

I had a Gigabyte DS3, worked fine for a few weeks, then one day during gaming, I got a quick blue screen then a black screen. After some testing of components and getting advice, everyone thought it was the motherboard. I sent it back for a refund then bought an MSI P6N Plat.

When I got it, it had a crack that later broke off on one of the mounting holes. In any case when I installed it and powered it up, same problem, all fans spin but all I get is a blank screen... I did the following

RAM:
Corsair C4, I tried them in a different PC, they worked. I then tried one at a time in each slot, same problem, blank screen.

CPU:
E6420, tried it in a different PC, it worked.

Video card:
EVGA 8800 GTS 320, could not try in a different PC, but I did use an old 7600 GT that I know works, but same issue just a blank screen.

PSU
OCZ 700W, tried same PSU from a different PC that works, same issue blank screen.

I even took the MB out of the case, but that did not help either.

At this point I am lost, I have tried every major component in another PC and they worked. I am having the same issue I did with the DS3 but now with a new mobo. I tested all the components in another PC and they work, so I am just completely lost. I have no idea what to do or try at this point. All I can think of is this board needs 1.8V ram to post the first time? I do not understand why in another PC the parts work but don't work when all hooked up together. I do not have a case speakers so I do not get any beep codes. Could it simply be bad luck since the MSI board had a cracked
mounting hole? Would that cause the mobo to not post?

Any help appreciated.

 

[Puffnstuff]

Cracked mounting hole? Was it new? No new mb should have any crack of any sort on it. RMA it now as it's probably already been abused. I run the p6n sli plat and it's a fantastic mb but how did you crack it? Are all of your power connectors properly attached? Are your mb standoffs in the right places? I know its frustrating when problems like this occur and I've had my fair share of them. Just approach it in a systematic manner until you eliminate all possibilities and find the answer. I went through a similar situation yesterday while replacing the mb in my parents pc.

 

[robucf]

It came cracked, but while aligning it, the tip broke off. I RMA'ed it, hoping the crack was the problem. The mere fact that 2 mobos had the same issue points to one of the components. I tried to find which one by using the RAM and CPU in another computer, they both worked... So then I thought maybe the PSU, so I tried a different PSU, same issue, black screen. I even tried different RAM and still nothing. When I get a new board I will start back from scratch because at this point I have tried so many different things, its all just beyond frustrating. I honestly thought a new mobo would fix it, oh well... To answer your question, yeah I chechked the connectors and even a new PSU but no luck.