Help my PC won't switch on

[DBZfreakMBB]

4 weeks ago i upgraded to a Msi GTX 970 4G from a Gainward GTX 760 and after a days use i turned it off and went to sleep i wake up the next day and it won't turn on, naturally i thought it was the PSU so i bought a new one which was the Seasonic G-650W 80+ gold After i installed it it worked! but after a day and a half i shutted down the pc, an hour later i tried to turn on my PC and it won't turn on?!? what is happening to my pc? My specs are:

FX 8320 at Stock 3.5GHz
MSI GTX 970 4G
8gb Crucial ram
Seasonic G-650W 80+ Gold
Gigabyte GA-78LMT-USB3
1TB Western digital hardrive 7200RPM

 

[sincreator]

Check your jumpers coming from the front panel of the case to the motherboard. If they are loose, the power button may not be working. Actually, check every power connector that is hooked up. Especially the 24 pin and 8 pin cpu connector.

 

[DBZfreakMBB]

No its the pc the lights at the front don't come on when i plug in the power cable or when i flip the I/O switch on the psu, it might be faulty but this is a puzzling problem it has happened 2 times i don't know if its coincidental or its simply a faulty psu.

 

[sincreator]

At this point I am starting to suspect the motherboard. I doubt it's the Seasonic PSU that is the the problem. Try just one stick of ram in slot one first, and see what happens. If It's the same result, try a different stick in a different ram slot.

You can also try resetting the CMOS on the motherboard. The procedure should be in your manual.