Hi!! I have this weird situation. After some months (about a year) of not using this laptop, I started using it for browsing and light work. First I noticed that was randomly freezing... Screen stuck, no mouse movement, no hard disk led. Only holding the power button for some seconds to turn it off.
After testing different situations, found that it happens when I move the computer... not talking about heavy shakes. Regular movement like when taking from a desk to your lap.
That is what I have tested already:
-Bios updated to latest version.
-Temperatures monitoring (CPU's and disk under 40ºC)
-RAM tests ok (mem86+ and Windows Memory Diagnostics)
-Ram modules out, cleaned contacts and back in.
-Reinstalled Windows (twice -> Win 8.1 and also Win 7).
-Tested with a different hard disk.
Any ideas or information of being a known issue? Thanks!