Quote Originally Posted by mguzzo View Post
keep in mind that HUD are VFDs and degrade over time. Not surprised that a 20 year old display has lost some of its brightness.
Yeah, hence my comment about the half-life of the display. I will check the dimmer switches. I suspect that the display itself is just not capable of going any brighter any more. This would explain the dimmer switch doing nothing in the top third of its travel.