IMPORTANT
The problem turned out to be that the CMOS battery was exhausted, so changing it was enough. Make this test as the first test on the motherboard, because you could give for dead the whole mobo just because of the battery!
Original question
So suddenly, overnight, my computer doesn't turn on anymore: not a single sound or light when I hit the power button.
This is the system:
- psu: Cooler Master V850
- case: anidees AI-CL-Cube-W-RGB Cubo Case
- mobo: Gigabyte X399 AORUS Gaming 7
- cpu: AMD Ryzen Threadripper 1950 X 3.4GHz 32MB L3
- ram: Corsair Vengeance RGB LED 32 GB, 2 x 16 GB, DDR4 2666 MHz C16 XMP 2.0
- vga: Gigabyte AORUS GeForce GTX 1070Ti 8G
(I have omitted other components, like the HD, as it being broken is not compatible with a no-sound-nor-light-anywhere, as far as I know; but if more info is needed, please, let me know.)
My first thought was the PSU, so I tried the paper clip test, and I hear the fan noise from the PSU. Is this test enough to assume that the PSU is working, or at least that the whole system should give a minimal sign of life?
If the answer to the above question is yes, then my understanding is that it could be a mobo failure and or something wrong with the power button of the case, the reason being that since cpu ram and vga are connected to the mobo, my understanding is that if the mobo was ok, I should at least see some light on it, for instance the one telling me the OS is not standing yet.
So how can I make sure the power button is ok, and, if it is, that the mobo is totally dead?
In hindsight, is it possible that brownouts and "the opposite of brownouts" can break a mobo? I thought that they mostly kill the PSU, which I way cheaper than my mobo :(