Lenovo T420 Random BSOD Occuring

**axe0** · 01 Sep 2016

Let's start with a standard test.

Diagnostic Test

RAM TEST

Run MemTest86+ to analyse your RAM. MemTest86+ - Test RAM - Windows 7 Forums

Note

MemTest86+ needs to be run for at least 8 complete passes for conclusive results. Set it running before you go to bed and leave it overnight. We're looking for zero errors here. Even a single error will indicate RAM failure.

Make a photo of the result and post it.

Addition:
If errors show up you can stop the test, remove all sticks but 1 and test this single stick in each slot for 8 passes or until errors show, switch sticks and repeat.
If errors show up and you see them a lot later, no problem, the errors don't affect the test.

Daimyo21 · 14 Sep 2016

Ran memtest and sure enough one of my sticks of ram had gone bad(800,000+ errors after 2 passes), I also ran a lenovo memory diagnostic test and failed 90% of tests. It was a crucial 8 gb DDR3 1600 stick of ram. It may have failed somewhere down the line and thats why all the instability.

Ill create another post if it happens after the fact but I think that was the culprit.