[SOLVED] Memory making weird buzzing noise

[T0wns]

So I just had some work done on my pc, I had the back I/O panel removed so I could make room for other expansions, and it won’t boot anymore. The system makes a weird buzzing noise coming from the RAM.

It randomly chose to boot up once, but I wasn’t thinking and I tried to put my GPU in while it was running. There was a sparking noise, and it returned to that state.
I have tried:
Replacing all the memory
Unplugging my gpu and my usb 3.0 card
Switching power cables
Unplugging and plugging back in all of the PSU cables
Just repeatedly unplugging-plugging back in the power cord
My PC is an old HP rp-5800 with an i5-2400, GTX 1050 TI, 20GB ram, 1TB HDD, and a 240 watt PSU.
Please don’t comment on how bad my system is unless it’s helpful.
So what can I do?

 

[Krotow]

Didn't said that motherboard repair is cheap. But possible. For intro see the repair of motherboard where faulty VRM fried the CPU. Not your usual capacitor replacement kindergarten. Or how repaired GPU, marked by a cat There are plenty of other examples - you can find them by yourself.