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

Oct 12, 2021
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)
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