It does recognise my HDD, as it is listed as first booting option on boot manager (F12) so it's not dead.
Not recognising a HDD is fitted, first boot device is just an option.
Your notion of remove and refit drive was a good one, but if machine is not finding it then a good chance it has died.
You need to go into the BIOS and force a search for Hard drives to see if the BIOS can find your drive.
or put he drive in a caddy and attach to another PC to see if that machine can find it.
Do you have a back up of all your data?