Suddenly black screen on Acer Aspire VN7 591G

Syrax

Yesterday when im using my Acer Aspire VN7 591G it was working normally. When i shut it down and the evening im started it back up i only have a black screen,  the red keyboardlights and the only two leds for charging and telling it that the laptop is on are lighting up. When i boot it up its dark screen no Acer logo so i cant go into the actual bios. When i hook it up with my monitor i can only see the monitor but not my actual screen. What can i do?

What i've already done is this:
Reinstalling the RAM
pressing the on/off key for 30+ s
trying to press ESC+FN, F2, F9 and F10 to go into the bios menu

Someone that can help?

Commodore_1995#

Hello! Have you tried resetting the internal battery?
https://youtu.be/NfhgnxUJoZo