One box of 4 on second monitor very dark

Not sure what is problem but one of my boxes on second monitor is very dark all the time. Looks like all in game video settings are the same. This one box stays dark when its the focus or when its not. Any idea what I might need to look at?

[lax]

If the dark window has a different windowed mode setting that might do it. Dynamic lighting would make it look very different.

Otherwise it might be easiest to just check your eqclient.ini files directly. There will be a separate one like eqclient-mycharacter.ini in your EQ folder, for each Character. Worst case, you can probably just copy the eqclient.ini file from one with known good settings, and replace the one with the presumably bad settings.