Motherboard and hard drive conflict?

Question

Iron

Situation: the hard disk "falls off". That is, it simply disappears, the system stops seeing it, as if it was simply turned off. We carried out tests with various programs of the hard disk (AIDA / Vika and others), they say that there are no problems with the disk.
There is an assumption that there is a conflict between the motherboard and the disk. Changed the SATA cable, does not help.
You reconnect the cables, update the configuration and the disk is back in service, 5 minutes pass (sometimes it doesn’t disappear for several days, it happens 10 times a day) and again it’s out.
Who can help or share suggestions?

Answer 1

a) Power supply unit
b) Oxidation of contacts (just encountered a couple of months ago) c) Does it
work on another mother?

Answer 2

90% problems with the power supply (there were even cases when the cables and connectors with which the screw was connected were damaged), 7% with the screw, 2% motherboard 1% something else. (statistics from personal experience).
You need to start by switching the screw to another connector on the motherboard and changing the connector from which the screw is powered (it is better that they are not on the same cable). If this does not help, then put another PSU for a few days. If this does not help, then the screw is placed on another motherboard and it is observed how it behaves there.

Answer 3

There are definitely problems either with power or with contacts, since reconnecting helps. Here are the options:
- the contacts on the screw connector are worn out / damaged
- the contacts on the power supply connector from the PSU are bent / damaged / dirty
- a dead PSU that does not pull the load
The easiest way is to change the PSU and see what happens, especially if it is one of those where the main thing is the price.

Answer 4

Smart to the studio