Black screen on Satellite M40-185

After some months trouble with sudden switch-offs finally my Toshiba Satellite M40-185 got a black screen and it cannot do more. I have an external monitor but it also is black.
Should I try to get a new LCD inverter or let the Toshiba service get it and look at the motherboard?
Perhaps its completely dead?
Any help and suggestions welcome!
Dimitris

Hello Dimitris
If the result is the same on notebooks display and external monitor there is probably serious hardware problem and just service can help. I presume that graphic card is the troublemaker and I am afraid the mainboard must be exchanged.
Of course, I cannot say this for sure. Because of that let the technicians run diagnostic programs to see what is wrong with your notebook.

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