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Blue Screen Again
Posts: 2
Registered: ‎10-31-2013
Location: Denmark
Views: 10,742
Message 1 of 4

T400 screen - loose connection

Dear All,


The screen of my Thinkpad T400 has started to act weird the last couple of weeks. As far as I can tell, it seems to have a loose connection as it goes dark if the hinge is not in a specific angle where the connection is working fine.


I have been searching around thius forum and others but without any luck. However - I found a video on youtube with someone who has the same problem:


Does anyone know how (if possible) to fix this?


Jakob - Copenhagen

Community Moderator
Community Moderator
Posts: 4,148
Registered: ‎07-24-2013
Location: CH
Views: 10,723
Message 2 of 4

Re: T400 screen - loose connection

I can think of the cable being loose, or the connection to the mainboard. 


If you are not afraid of opening your laptop you can download the HMM (hardware maintenance manual) from here => click me! and remove the battery, palmrest and keyboard bezel following the instructions from the manual. Then check the lcd to motherboard connector as shown in page 117 of the manual (not page 117 from your pdf reader!)


If that doesn't change you may need to check the connection of the cable to the LCD, this means more dissasembling, but let's try the motherboard one first.


Hope this helps!




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Community SeniorMod
Community SeniorMod
Posts: 10,253
Registered: ‎01-01-2010
Location: US
Views: 10,707
Message 3 of 4

Re: T400 screen - loose connection

It might be a cracked wire in the LCD cable. I would start there


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
Blue Screen Again
Posts: 2
Registered: ‎10-31-2013
Location: Denmark
Views: 10,530
Message 4 of 4

Re: T400 screen - loose connection

Sorry for this very late reply, but I have not had time to actually fix the laptop until now (have used my girlfriends in the meantime).


I managed to buy a used screen for 30€, since there was a problem with the LCD connection, and I could not find out how to just replace the cable. I've just connected the new screen and it works suberb. Thanks for helping me locate the problem and solving this!






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