Could the PSU burn the HDD?

Question

Power Supply

I apologize for the wordiness, but I will try to describe everything to the point.
There was a setup:
Intel Core i5-7600K
Motherboard ASUS PRIME Z270-K
Radeon HD 5770
DDR4 DIMM 16Gb (2x8Gb), 3000MHz
Power supply 600W ATX e2e4 UNION APOCALYPSE, 80+
Everything worked fine, only for a long time there was a glitch - the monitor is very rare it could go out for a second. Either it was in the vidyuhi or in the monitor itself, I did not understand.
Now I took Sapphire Radeon Pulse RX VEGA 56.
I inserted it into the computer, everything started up, but the monitor began to go out several times a minute.
Based on the fact that the PSU is noname, and it is recommended for 750 watts, I ordered a new one, but while I was waiting for it, I disconnected everything unnecessary from the computer and set it to minimum power consumption. After that, the "blinking" almost stopped. But after a couple of days, at some point, the monitor began to blink very often, I urgently turned off the computer.
After that, the computer stopped producing an image at all, even from the integrated vidyuhi. went through it, reset the bios, etc.
But after standing for a day, it started up, displayed the image from both the integrated and the new vidyuhi without any problems, but now it does not see one of the HDD disks in the BIOS, the disk also does not show signs of life.
I honestly have no idea what happened and what to do next. Was it a PSU glitch that almost burned the mother and killed the HDD, or is it so strange that the mother is buggy. Or something else.
Put in a new PSU and take a new disk, or is it a buggy mother and look for a replacement for her?
Unfortunately, I live in Fardy and there are no normal SCs, and I don’t know anyone with the same PC to rearrange the components from a computer to a computer and check what exactly the problem is.

Answer 1

An iron rule is not to spend all your money on a video card, hoping that any cheapest PSU will pull it out if the required power is written on it.
What exactly you killed, trying to squeeze out of the power supply what he could not give, is difficult to say without cross-testing. The meaning of such testing is to plug a disk into another slot on the motherboard, plug another disk into the same slot, and so on.
It is less likely that the problem is with the motherboard.

Answer 2

only for a long time there was a glitch - the monitor very rarely could go out for a second. Whether it was in the vidyuhi or in the monitor itself, I did not understand

There is a suspicion that the monitor has nothing to do with it, but the video card is "to blame" for everything, or rather, of course, it is not to blame, just the symptoms that have manifested are from it. For example, missing the image for a second is a famous bug Видеодрайвер перестал отвечать и был восстановлен, and this is quite possible just because of a lack of power or overheating of the card itself, but the latter does not seem to be your case.
And the same is not needed. PCs are good because the compatibility of components is wonderful!
If we assume that the PSU was operating in overload mode, then, quite possibly, you were slowly killing it, well, or it was dying itself. And, perhaps, the disk is still alive, but it lacks power from a half-dead PSU. You can take any normal high-quality PSU with sufficient power and plug it in instead of your own (without even removing the old one from the case - from the outside) or take your drive to any friend who has any PC (not a laptop).