Friend's PC does not start

[HeavyMetalGamer]

So a few years ago I built my friend a gaming computer for him, it currently has a second had i7-7700k, MSI Z170 gaming m7 motherboard, 8GB x 2 Trident Z RAM, MSI Gtx 1070, and a Corsair CX750M PSU. The other day he told me it shut down on him randomly and wouldn't turn back on. I'm now working on it and it is at the point where the internal power button and the CMOS clear button on the back light up but the computer does absolutely nothing when either the case or internal power button is pressed. No fan spin up,  no other lights, nothing. Tried clearing CMOS, took it down to a single stick of RAM, swapped which stick of RAM was the single stick, took out the gpu, reseated the cpu and redid the mounting of the aio (1st gen kraken 240mm). At this point I'm thinking maybe something shorted on the motherboard but I'm wanting to get some other ideas. Thank you in advance!

[Aniallation]

If BIOS settings (CMOS), RAM, or even CPU were bad, it would still "turn on", just won't POST.

 

It sounds like either a PSU or motherboard issue. However, as there are still signs of power like the CMOS clear button lighting up, I'm inclined to suspect the board.

[HeavyMetalGamer]

1 minute ago, Aniallation said:

If BIOS settings (CMOS), RAM, or even CPU were bad, it would still "turn on", just won't POST.

 

It sounds like either a PSU or motherboard issue. However, as there are still signs of power like the CMOS clear button lighting up, I'm inclined to suspect the board.

Yeah I still wanted to sanity check myself at the very least because I really didn't want it to be a bad board and that's what I had a feeling it was because of the few lights on the board lighting up. Thank you!