Computer turning on and off repeatedly. please help

rZero3

Reputable
Apr 9, 2015
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4,510
My computer keeps on turning on and off by itself. Everytime I turn it on it turns on and off repeatedly. I tried to take out the unessential hardware (e.x Graphics card, Ram) and then i tried to turn it back on but it still kept on turning on and off. The problem may be in the power supply but
am not entirety sure. What do you think may be the problem.

Extra info:
* Fans run slower.
* Cpu gets really hot after 5 seconds.

PSU: 500 wats
GPU: twin frozor 750 ti 2GB
RAM: 4GB
HDD: 1TB
MOB: Gigabyte B85-HD3
CPU: i5 4670K Quad Core