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Lenovo ThinkPad T400 was a laptop introduced by IBM for corporate and commercial use. The T400 was released along with the T500 in July of 2008. Similar models include the 400, 410, 420, 510, and other models in the ThinkPad T series.

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My laptop screen only works at a 45° angle not 90°

My laptop works perfectly at 45° but the screen goes blank if you lift it further.

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Hi @theacook ,

The video cable may be damaged where it passes through the hinge area between the body of the laptop and the lid.

Here’s a link to the service manual for the laptop.

Scroll to p.116 to view the necessary pre-requisite steps and then the procedure to remove the display assembly.

This will allow you to inspect the video cable for any damage and also its’ connections to the motherboard and the display panel in case one is loose etc.

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Hi Flameznstarz !

This is a connector problem between the motherboard and the display.

Disassembly of the computer for replacement of the connector will be necessary to solve the problem.

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Flameznstarz@gmail.com さん、ありがとうございました!
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