no signal on monitor, fans later stopped, what died?

Jun 15, 2018
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earlier this morning i was playing a game when suddenly my monitor lost signal but my power light remained on. i can’t quite remember if my fans were still in at that moment but i then proceeded to force shut down my pc and turn off the psu and open up the side panel.

once i opened it up i turned it back on and saw that the fans were still running but had no display but i felt that there was an occasional slight buzzing noise coming from my graphics card. i can’t quite remember if this was normal to me or not because of my gtx 660 being loud as it is. i switched hdmi cable to make sure what it was, also tried a different monitor and i even plugged my power supply into different outlets and still the same issue. i started to figure that it either could be the psu or gpu considering both are pretty outdated and ironically i’ve already planned on upgrading as it is. but after that i turned around to put up my other hdmi and all my fans were off and my power light was still on. i switched off my psu and waited a moment then turned it back on and pressed the power button. same thing once again, no fans, no signal but on the bright side my disk drive still works lol

in case you’re wondering here’s my specs
i5 4590
gtx 660
asrock h97m pro4
my psu: https://m.newegg.com/products/N82E16817207013

ALSO. i’ve had this computer for maybe 4 maybe 5 years so i wouldn’t be too surprised if my gpu would start dying about now, same with my power supply