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Blue Screen Again
Posts: 1
Registered: ‎10-17-2016
Location: GB
Views: 1,026
Message 1 of 2

T400 ThinkPad Windows 10 screen switches off

I have a T400 ThinkPad upgraded to Windows 10 that suddenly had a blank screen and no lights except for wifi.

On closer inspection I discovered the backlight is not lit during startup, whilst ThinkPad splash and window symbol are displayed but then, screen goes blank and then I hear the windows startup sound.

Displays perfectly on an external monitor. I have replaced inverter, lcd cable and screen .... nothing works! I'm not sure if I should just resell the parts I bought and get another laptop .... can I transfer Windows 10 to another machine or is there another fix I could try? I don't have much money.

Any help appreciated.

What's DOS?
Posts: 1
Registered: ‎03-04-2017
Location: US
Views: 875
Message 2 of 2

Re: T400 ThinkPad Windows 10 screen switches off

I am going to assume your t400 has switchable graphics. If that is the case, this is likely the cause of your problems.  Your laptop's screen is working fine as it shows the Lenovo and windows icons. Boot your machine, access the bios F1. And modify the settings around graphics. This should solve it. 

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