Hello Dell Community
(LAPTOP DELL INspiron 15R N5221--CORE-i7 3517U --1TB HD--8GB ram--2GB AMD RADEON)
one month ago I was working on my laptop then suddenly a msg appear informing me of hard disk failure ... when I run diagnostics nthing appear to be wrong .. however days ago my laptop begins to freeze and be very slow while the same msg still appearing .. I ran diagnostics yesterday Hard disk problem appear from first test sending error code =3E ..... this mean a hard disk failure and I should replace it i knw that ... However there is something called maintenance :D :D .... i went to a maintenance market ... and the technician found that my hard disk media are running very well however the problem was within the SMART he repaired it (by Rechecking something's in firmware)...then i installed a fresh copy of Win8.1 no error msgs appear and everything is working well ... i ran diagnostics no errors appear .. HOWEVER AT THE END OF THE DIAGNOSTICS THERE WAS AN EXTRA TEST FOR MEMORY (30minutes test) I RAN IT AND THERE WAS AN ERROR 2000-0142 ------------> i ran as well as online diagnostics and this was the results ::::::::::::::::