they've apparently found "1 memory module to be faulty" and are replacing it, which.. a RAM test is going to be in the easy diagnostic gauntlet to run + they didn't find anything the last two times. so I'd believe that that's one issue they're finding NOW, but not the root cause of its crashing
pc is back in service jail and this time with a massive written log of every crash it's had for the last four months. three doublesided pages. if they can't replicate the fault theyll get the head tech involved bc it's the third time it's come in due to being unresolvedly shitty