Help needed with VGA monitor

[Fate Zero]

So my original monitor died and I'm stuck with a VGA monitor. It was working fine until the VGA cable broke. I got a replacement cable however the resolution had changed and all my videos became letterboxed when I tried to watch them. I'm aware this can happen as I'm plugging a 4:3 monitor into a 16:9 Laptop, however until I got the new VGA cable it was never this bad. I tried changing the resolution and now it says frequency out of range whenever I go to use it. I've tried booting in safe mode on a lower resolution but then it doesn't even start up. Anyone know what I could do? Thanks