Question External monitor image turns off and on on laptop

[Jesse_Pinkman]

Hello, I plugged a VGA input monitor into my Casper Excalibur G770 laptop with a VGA to HDMI converter, but whenever I try to open a video file or plug it in and out of the charger, the screen goes black and comes back.
I have an external GTX 1650 on the laptop. By the way, the same thing happens when opening the NVIDIA control panel.
How can I solve this problem?
You can watch the sample video.

 

[rgd1101]

how old is the laptop? check or replace the battery?