However the HDD failed on post 3, as well on the other topic.
On that test, the disk check could not even find the controller - although I suspect that may be misleading, as the report tends to suggest that the error is because that BIOSTAR motherboard SATA controller is not supported by the Hitachi drive test
I saw the check using both utilities
AND the failure of both tests on the HDD, would it be worthwhile, tesing the HDD out of the computer, connected to an enclosure and using Seatools for windows which will test external drives.
and that was why I suggested, that it MAY be worthwhile, trying to ensure, that the apparent error on HW monitor or indeed on the disk check, is either the drive, the PSU or indeed the Mobo.
In repect of those possible issues - that BIOSTAR board
has a built in system debug with led error codes
Rapid Debug3 posts critical POST code information in a digital LED display. When system malfunction occurs, it auto-detects the device’s failure and translates the error codes on the digital LED. It also shows the CPU temperature on the same screen.
I think it may be worthwhile running the debug and seeing what if anything is reported.
If you do NOT have the user manual may I suggest you download it from that site, it will most certainly cover the use of the debug.