Dash Panel Issue

[Classics Fan]

So to close this thread: today I pulled the panel, replaced all the original incandescent bulbs with new LEDs, and made sure the two ground screws on the printed circuit were clean and tight. There is a ground wire from the back of the panel to the metal dash. One end looked suspect so I replaced that. The end result when everything was put back together is a brightly lit panel that functions as it should. Thanks to everyone who contributed with suggestions on what to look for!