[HELP] CPU Fan restarts after power and pc not booting to bios

Mar 25, 2018
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I've browsed for other similar threads and I haven't got my desired answer because symptoms were different in a way, though I still tried the suggested actions for troubleshooting, still haven't satisfied me and fixed my problem.

I'll try to keep this simple as much as possible.

PC was working for few weeks after it was custom built by me, then 3 days ago it started not to boot up, this was easily fixed just by restarting using the restart button, or a power drain restart.

Now, can't seem to fix it with a restart. Key points:


  • ■[strike][/strike]CPU fan turns on, then off after 2-3 secs, then on again. then just continues on like that.(no loops happening, only CPU fan resets not other fans)
    HDD LED light is not turning on in front of the case
    TRIED to boot at least up to BIOS with minimal parts only (PSU, CPU w/ fan, 1 RAM (tried both slots), and a keyboard)
    TRIED re-seating / cleaned everything including cpu with thermal paste replaced, also checked the cpu pins / RAM teeth , all good and clean.
    TRIED bios reset, no good, battery is new
    CHECKED mobo for short circuit causes, none
    CHECKED loose/damaged/disconnected PSU wires all intact
    DID the paperclip test just to be sure PSU is working, and it is.

What could be the culprit here? Since I tried booting with minimal parts, Problem now only lies within the PSU, MOBO, CPU, RAM

Pretty unlikely because all parts are new and has warranty but I'm trying to find out because maybe it's just some Minor stuff that I've missed out and I won't have the hassle of sending this back and waiting for months just because of maybe a small thing or something that I can fix myself.

Here's my rig:

  • MOBO: Gigabyte GA-A320M-S2H DDR4
    CPU: AMD APU A10-9700k
    RAM: (2x4GB) Hyperx 8GB DDR4 2400MHz
    HDD: WD Green 500GB
    GPU: Palit GTX960 DDR5 128 bit 1 Gb
    PSU: Trigon Generic 700w
    AVR: Standard 3 Socket 220v AVR