Yes, I have the trim pot turned full left (counter-clockwise). That's the only position that gives legible contrast.
And it looks like I was premature in saying the problem has worked itself out. After starting up from being turned off several hours, the backlight is back to giving crappy display contrast. It looks like if I turn the backlight on while the QMX is transmitting, the screen can flip back to having good backlit contrast.
