msi ge62 6qd ms-16j5 ram issue

[Biggtechman]

i recently purchased a this msi ge62 laptop as a dead laptop for a good price.
the laptop would post, just boots to a black screen and hangs, it did seem to bootloop, but stayed on black screen.

upon inspection i found it would work with one ram in, upon further inspection i found it was the bottom ram slot that had the issue.
i cleaned both slots and both ram sticks, then it booted.
but once i got into windows it started playing up and froze.
i cleaned the bottom slot a second time, had the same result, accept this time i found the laptop screen would go off if i slightly twisted the board and flash back on when twisted the other way.
when not using the affected slot the laptop works perfectly.

i have attached a pdf of the schematic's for your convenience.
thanks

 

[2informaticos]

Try first resoldering affected RAM slot.
Problem could be caused by broken traces, or solders under CPU.
If DDR4 test card available, use it to locate bad lines.

Schematic, where???

 

[Biggtechman]

no test card atm.
ill try resolder the affected slot and report back.

schamatics is to large, its only 1.3mb

 

[2informaticos]

Don't worry about schematic, I have it (MS-16J51).
Was strange you said attached, but not...