I have a problem that is quite strange. Every now and then I'll wake up and try to turn on my computer and there is no fan spin at all. It only happens when it has been shut down, it never crashes when it is on. This has happened four times in the past six months. I've tried resetting the bios every time it happens as well as checking the power supply with a paperclip. The power supply works but after resetting the bios and trying to reseat or remove one stick of RAM doesn't seem to make any difference. What puzzles me is that about two weeks later on average (it took four months one of the times and two days another), it turns on and works perfectly with no signs of damage. I did get a fail to post with fan spin once but the GPU indicator light was on so I reseated the GPU and everything was fine. I didn't see any errors either. I have also turned off fastboot as this has seemed to work for other people with a similar problem but it hasn't worked for me.
Specs:
CPU: AMD Ryzen 5 2600
Mobo: ROG Strix X470-F Gaming
GPU: msi GeForce GTX 1050 Ti
RAM: Corsair Vengeance LPX 8GB (x2)
PSU: Corsair CX550 (80 Plus Bronze)
SSD: WD Blue 250GB SSD
HDD: Seagate Barracuda 2TB HDD
(I also have a Gigabyte GC-WB1733D network card)
Specs:
CPU: AMD Ryzen 5 2600
Mobo: ROG Strix X470-F Gaming
GPU: msi GeForce GTX 1050 Ti
RAM: Corsair Vengeance LPX 8GB (x2)
PSU: Corsair CX550 (80 Plus Bronze)
SSD: WD Blue 250GB SSD
HDD: Seagate Barracuda 2TB HDD
(I also have a Gigabyte GC-WB1733D network card)