T400 switches sleeping mode when opening angle greater than 40 degrees

When you open the machine to boot, I must open in the corner from 0-40 degrees. I have to slid hand to press the Power button, the computer boots normally into Windows 7. Then:
- When I open angle greater than 40 degrees (40-180 degrees), the machine switches to sleeping.
- When closed off the screen in less than 40 degree angle, the machine is turned on (switch to normal working mode)
Error picture
Please tell me the cause and solution.
Thanks for any suggestion
Cuong Le
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Solved!
Go to Solution.

Hi Cuonglp,
Welcome to Lenovo Community!
As per the query we understood that you are facing an issue with Display on your ThinkPad T400.
In this case the issue might be with LCD cable, I suggest you to check with reseating LCD cable once.
Please click here to visit the link on how to go with reseating the cable, go to page 143.
Hope this helps.
Best regards,
Hemanth Kumar
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