Hello I find your problem to be an interesting one. Although I have heard of your problem happening before.
I am referring to your shutting down the computer the proper way, only to have the computer start back up again.
I realize at this moment you have a formatted hard drive. So I know you no longer have Windows shutting down the computer at this point. So I am trying to guess here how you are shutting the computer down, besides just turning it off. ( I assume by using the power on button?)
Motherboards have different options that can be set in the BIOS for what the power button does when it is pressed in while the computer is already running.
If you were lucky enough to get a motherboard manual with your motherboard, I would read up on the options available in your motherboard's BIOS setup that has to do with how the power button on the computer case functions.
I would pay close attention to the main menu of your BIOS where it may mention POWER OPTIONS.
I am not clear at this point if you are able to get any picture at all to show up on the monitor.
If you can at least get the BIOS menu to show up, we have some options to work with here.
If your display is blank and both on-board and add-on video graphics displays are suffering from this problem, then it would be clear you could be suffering from a processor problem.
It appears you are using the same processor on another motherboard, while most of your other hardware has been replaced along with this motherboard.
I would also take it you have the same RAM modules that you had in the other motherboard.
It is not unheard of that RAM can cause issues like this as well.
Now there is a possibility you have this motherboard shorted out somewhere, but it appears you are also suffering the same results you experienced with an entirely different motherboard, so I tend to believe you did not make the same mistake twice. Therefore I do not truly believe your motherboard is shorted to the case.
I am correct to assume you have both the same processor and the same RAM sticks on this motherboard that you had in your original motherboard. Is my assumption here correct?
Edited by MrBruce1959, 05 November 2010 - 12:21 AM.