Massively worried, new pc doesn't post and turns off immediately.

Aug 24, 2018
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Alright lads sorry to be a bother you but I really need some help right now and if I can solve this problem without going to a tech shop I'll consider the PCMR to be true.


My system is:
Motherboard: A Gigabyte z270x-ud3
PSU: Thermaltake 600w 80 Plus Smart
CPU: Intel I5 7600
CPU cooler: stock cooler (I still get temps under 40 ºC under load anyways so I didn't invest on a more powerful one)
GPU: nothing, using my IGPU for the moment.
RAM: a single 8gb Ddr4 3200Mhz Adata Xpg stick
Storage: Western Digital Wd Blue 1tb 7200rpm


Now, my problem is this: I was using my pc as usual yesterday, running chrome, discord and HOI4 and then for seemingly no reason my pc gave me a BSOD, I rebooted it, nothing out of the ordinary, then it did it again. I rebooted it again, but it didn't post, instead turning everything on (I can tell because of the lighting) and then turning off and automatically turning on again and repeating. I turned it off for the night and unplugged it, then today I plugged it back and tried turning it on, to my surprise it worked, I thought maybe the problem had fixed itself, but alas after a while it turned off and now it won't turn on again, it seems to try to turn the system on for a second and then give up.

Please help, and thanks for going through my ramblings.
 
Solution
Unplug wall power, reset the BIOS by pulling the CMOS battery for about 10 seconds. Hold in the power button for about 30 seconds. Plug everything back in see if it runs OK after that. Go over all connections and re-seat them, including all power plugs and RAM, check that motherboard stand-offs are in the right places. Test with a known good power supply. Could be a power supply issue, bad motherboard, something not connected well, even faulty RAM or hard drive, CPU. Really almost anything is possible.
Unplug wall power, reset the BIOS by pulling the CMOS battery for about 10 seconds. Hold in the power button for about 30 seconds. Plug everything back in see if it runs OK after that. Go over all connections and re-seat them, including all power plugs and RAM, check that motherboard stand-offs are in the right places. Test with a known good power supply. Could be a power supply issue, bad motherboard, something not connected well, even faulty RAM or hard drive, CPU. Really almost anything is possible.
 
Solution