did you check very carefully to make sure non of the metal standoffs are contacting the backside of the MB in places other than the screw holes? That's been a very common problem area. It's also possible to force start the PS by connecting a small load such as a hard drive, fan, etc., disconnect the MB main power and momentarily short the green pin to a nearby black one. If the PS doesn't turn on, it's likely bad. Another trick is to just connect everything outside of the case. Put the MB on a non-conductive surface, plug in all components and manually short the power on pins on the MB's front panel pin array.
Two weeks ago my hard drive wasnt working, so I replaced it and didnt have time to turn it on to test, as I went on vacation. Two weeks later I bought a new case, and transferred all the components to the new case.
Now, the machine wont turn on, but the green LED light does turn on the motherboard but no fans turn on (not even for a second).
I tried a BRAND new motherboard, same issue.
I tried moving the ram in different slots. I did not (yet) try a NEW stick of ram.
While transfering the CPU into the new motherboard I kind of broke the little plastic connectors on the fan that go inside the actual motherboard to remain in place. They still snap into place fairly tight however. I'm wondering if its a CPU or CPU fan issue.
I currently use a p8p67 LE made by asus. I attached a picture, with the new motherboard im borrowing from a friend. the one im borrowing for testing purposes is a p8z77-v lx.
CPU is an i5
Ram is 2 x 4gb sticks
PSU is a 500 watt antec
I left the video card out on this motherboard to see if it would turn on without it, which it didn't obviously.
Hard drives are unplugged (tried them plugged in on my original motherboard which made no difference)
Like I said the machine worked fine before, so something obviously isnt plugged in right, or is dead.
Thanks for the help.