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ollikaa
Fanfold Paper
Posts: 3
Registered: ‎11-29-2017
Location: DE
Views: 1,390
Message 1 of 3

T520 Black Screen, No Keyboard

Hi,

since 2 days my laptop (type 4240-CTO) don't show anything when booting. The keyboard also doesn't respond and speakers are nonfuntional.

But if i plug in an external monitor, an usb-keyboard and headphone everything works as expected.

I recognize an short flickering on the lcd display shortly after booting, but then its dead. With the external monitor the boot-process is fully visible.

Has anyone some hints for me what to do?

ollikaa
Fanfold Paper
Posts: 3
Registered: ‎11-29-2017
Location: DE
Views: 1,385
Message 2 of 3

Re: T520 Black Screen, No Keyboard

I looked a bit around within the forum and found this thread: https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/T520-Keyboard-and-Display-failure/m-p/20...

 

I guess it describes the same problem i have.

ollikaa
Fanfold Paper
Posts: 3
Registered: ‎11-29-2017
Location: DE
Views: 1,312
Message 3 of 3

Re: T520 Black Screen, No Keyboard

I have replaced the mainboard with a refurbished one and now everything is working again.

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