I replaced a failed CRT display with a LCD panel with a VGA controller board. There is no problem with the display when the PC boots up. However, if I switch the display off then I get an 'Out of Range' error when I switch the display on.
I have tested the display on two different machines and the problem doesn't occur. Both of those machines have a 640 x 480 native screen resolution. The display menu shows the 'Problem Machine' to have a 720 x 400 screen resolution. I checked and the VIA Apollo PLE133T chipset with integrated graphics supports a 640 x 480 screen resolution. Being a DOS only system I do not have access to the display properties.
Back in the Windows 3.? era the monitor refresh rate was set in either the autoexec.bat or config.sys. In my research I have found commands lines to change the resolution but they were ran in the Windows environment. I do not have Windows and installing Windows is not an option. I realize that this is a strange problem but I have exhausted my technical knowledge.