Good night everyone.

First of all, I'm sorry about my bad english, but I need some help. A friend tried to install new windows 10 and had some troubles with his monitor. It didn't detected it from the start. He was conected by HDMI and tried to conected it on VGA . It worked for a minute. Then it gave us another error and again it wasn't being detected. The monitor don't works from the moment you get on the computer so we can't even acess to BIOS or something else.
We even tried to conect the pc on another monitor but is the same.

I've seen a lot of people having troubles with 2 monitors, but we only use 1.

Does anyone knows something about this? We think it may be an error on the monitor's resolution. But we can't try to change it.

Thank you everyone