Display does not come on?

I have a question about my laptop. Pavkard Bell LM89. The laptop goes to everyone runs normally, only the display remains black. I have a mall via HDMI but does not work. It only works with a VGA cable. I connect don't know where is the problem. But yesterday it opened, I looked, I tried the socket that is from the display to the motherboard, I opened and the display there, I also looked at the connections, everything is fine.

Win + p

duplicating would be my first approach.

Then would you still have the driver updated?

Monitor cracked / humidity / etc?

If it works via VGA and VGA is soldered to the motherboard, then HDMI should work too.
Blow in the HDMI input maybe dust has accumulated?

Swap the HDMI cable and see if it works on another device.

Otherwise I don't know anything in a hurry.

Yes normal white via HDMI also has to work but that is really strange. Yes, I do it today. As you said

But if VGA works normally the problem does not come from the graphics card ne?