BSOD error inaccessible_boot_drive after some hardware changes

Apr 27, 2023
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Hi there i have an old dell vostro 5481 with i5 8th gen , 1tb hdd, windows 11, 2x4gb ram ddr4

Recently i removed one of my ram sticks for some reason and now with only 4gb ram my pc ran normally without any errors for some time, then i reinstalled my old ram back and windows won't boot now. i end up with a bsod with inaccessible_boot_drive error.
I have tried removing that ram stick and running only on one stick but got the same result again.
The hdd is being read and all the data is still there as i ran "diskpart" cmd ( there was someting strange in "list vol" cmd as the info of my windows volume was blank which should have been "boot".)
I tried startup repair and mbr and bcd repair cmds and also an sfc scan but none helped.
Also my hdd short self test is failing!!(could that be a loose connector?)