HELP PLEASE V2- pc starts up for 1/2 second then turns off. See details below

pccooper

Reputable
Sep 27, 2014
23
0
4,510
ok firstly i plugged in a fan with the leds cut off whilst the PC was still running. Then the screen went blank and computer turned off. after pressing the power button nothing happend.

i bought a new motherboard which solved the previous problem and turned on however only for 1/2 a second, unless the cpu or its power cord were removed.

after lots of recommendations i bought a new psu but that didnt help.

do i need to buy a new cpu?