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  • Posts: 4
  • Registered: ‎05-07-2014
  • Location: Netherlands
  • Views: 74
  • Message 1 of 1

Flickering/Freezing Thinkpad W520

2015-03-19, 14:44 PM

Hallo all,


A couple of weeks ago my thinkpad started to act weird.

The laptop freezes and the screen will go cr crazy, only possibility is to restart the laptop by holding the power button.

My hardware configuration is:

1x Samsung 840 Evo 250GB (Windows 8.1 installed) Internal Sata

1x 1TB Harddrive (File storage) HDD Caddy

12GB Ram (Tested no errors found)

Intel i7 2630QM

NVidia Quadro 1000m

Better cooling fan (04W1574)

System is up to date


First thing i tried was reinstalling the OS. After reinstalling the OS the problem still exists. Tried different drivers for the chipset and graphics but i don't know if they are to correct ones. Updated the drivers with Intel Update Utility. Checked the ram and this could not be the problem.


When i looked in the system log i see a lot of errors like this:

: The embedded controller (EC) returned data when none was requested. The BIOS might be trying to access the EC without synchronizing with the operating system. This data will be ignored. No further action is necessary; however, you should check with your computer manufacturer for an upgraded BIOS.


There were also errors about ACPI but i can't see the logfile now so can't be more specific.


After reading this errors i decited to reflash the bios firmware which went good. After all these things the laptop worked great for about 7 days. After the 7 days the problems came back.


Please help me because i don't know where to search anymore.


Problem persists with integrated graphics and discrete graphics


Video displaying the behavior:


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