Solved! Laptop don't show any image either on display or hdmi output. Anyone with a solution?

[Shean0]

LENOVO Y520
After cleaning from dust and put it back in, the laptop turn the fans on but no image.
The laptop belongs to a friend who said that he disconnects the main battery and the bios battery, waited a few seconds and then when he turned on the laptop he started in sleep mode directly. It did this for about a year because the start button no longer existed.
I went to someone and that guy said my video chip is dead and I need a new one (the gpu I think)

 

[COLGeek]

Sounds like time for a new laptop.

In the meantime, see here:

https://forums.lenovo.com/t5/Gaming-Laptops/Lenovo-Y520-Power-Button-Stuck/m-p/4171609?page=1