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SubieForest2001
Serial Port
Posts: 14
Registered: ‎11-09-2014
Location: NL
Views: 196
Message 1 of 2

ThinkPad X220 - Two magnets in the top left and right corner of the screen.

Hello!

 

I was replacing the rear cover of the LCD. You know: the back cover with the Lenovo and ThinkPad logo on it. While moving all the antennas over, I found out that there are two magnets in the top left and right corner of the screen.

 

The genuine rear cover with the same FRU as the original I ordered is a newer version I think, the magnets of the old version were less than a millimeter too high for this one. After a while I got sick sanding those magnets down, and to make things worse, I also lost one magnet while doing so. It's somewhere on my bench, but I can't find it.
Anyway, I installed the screen without the magnets, and everything works just fine. I thought that they may be needed for standby, but I couldn't find anything like a sensor or something in the palmrest to which they 'magnet' too (if that's a word). Standby does work perfectly without these magnets.

 

So my question is: does anyone know what these magnets are ment to do? I've added a picture of one of them below.

IMG_2853.JPG

 

Thanks in advance!

Thinkpad X220, ThinkPad L440
Community SeniorMod
Community SeniorMod
Posts: 3,340
Registered: ‎12-01-2007
Location: US
Views: 139
Message 2 of 2

Re: ThinkPad X220 - Two magnets in the top left and right corner of the screen.

Hello,


I am not completely certain of this, but I believe they are meant to close Hall effect sensors that line up opposite to those of the rear cover of the LCD below the palm rest.  I suppose you could try gently running a magnet over the front edge of the palm reset to see if it causes the copmuter to think the cover has been closed and go into suspend mode (or whatever action you have it configured to perform when the lid is closed).

 

Regards,

 

Aryeh Goretsky

 



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