So on Monday I noticed that my dual-booting Lenovo G770 laptop would not boot to Linux Mint 14. I went through the normal BIOS start screen and the GRUB screen, then it goes to a blank screen with a nonresponsive cursor in the top left corner and stays there indefinitely. Since my computer had been running slowly recently, I thought it might be the hard drive and tried booting to Windows 7. Lo and behold, it booted just fine. I spent Tuesday mistakenly going after some kind of HDD problem, running fsck and Gparted from a live session of Linux Mint, but couldn't find any unfixable problems with the partition Linux Mint is installed on.
This morning, I ran Memtest86+ and discovered that my memory passed the first 6 tests just fine, but failed test 7 on seemingly every single address, quickly accumulating hundreds of thousands of errors. When I got home, I opened up the laptop and tested each memory stick (4GB and 2GB) individually. Both had the exact same problem. Now I'm really worried. Unless both sticks somehow had the same problem at the same time, something seems to be wrong with something on the motherboard common to both channels. It baffles me that Windows 7 and Linux Mint's recovery mode somehow still work. Can anyone suggest any possible courses of action for diagnosing or treating this, besides taking it to a service center?
UPDATE: Per a suggestion from another forum, I tried swapping in a compatible stick of RAM that I know works. It also had the exact same failure pattern in Memtest86+.
UPDATE 2:The test 7 failures are a known issue with the version of Memtest86+ I was using. My computer's memory is probably fine.
Edited by dpitch40, 29 August 2013 - 11:13 AM.