Question PC turned off, now monitor, mouse & keyboard are not working ?

[E46]

Just trying to figure out what this issue could be before I take it to a repair shop and have them look at it.

I was watching YouTube on my gaming PC and it suddenly turned off, I went to turn it back on but nothing happened. Waited about 5 minutes and tried again, it turned on, but there's no signal going to my monitor and my mouse and keyboard aren't lighting up, this happened the other night and it's doing the same thing. It has done this once before awhile back but the PC booted right back up and had no issues after that.

I've tried:

• switching RAM slots
• cleaning RAM
• shorted the two pins and took out battery to reset CMOS
• unplugged the reset plug and also took out the graphics card to see if it was that.

Nothing has worked and I'm confused on what to do next, I don't just want to throw money into the PC and have the issue not be fixed. Is there any other possible easy fixes that I have not mentioned yet? Any help would be appreciated, I've posted my PC specs below. Thanks!

Mobo: Asus Prime B360-MA Micro ATX
CPU: Intel Core i7-9700
GPU: Nvidia Gigabyte Wind Force 2070 Super
RAM: 16GB Corsair Vengeance
SSD: Adata SU500 1000GB
PSU: Gigabyte 750W Gold Rated
CPU Cooler Hyper 212 Evo