This brings back memories of the good old days of manual video card and monitor configuration of X86. May be dating myself, but back when there was only one distro that involved many floppy disk images (and 3.5¡± disks ¡ª thank god they weren¡¯t 5.5¡± although there were images for those too) you could cause all sorts of interesting video problems. Including exactly what you described. Only had X86 back then.
The fix is in the monitor configuration file if you¡¯re willing to try and modify that. Just a note, you could physically damage ¡ª as in release the magic smoke ¡ª CRT monitors although I don¡¯t think you can do that to any HDMI monitor.
I won¡¯t be able to find any specific information for a couple days but here¡¯s some info that could help:
Sure wish there was a utility like Xrandr back in the day, would have made things a bit easier!
73 de N0SR
JaySheepdog