hmmm... dips could be an issue. Was or is there any damage due to battery leak or other corossion on the board?
Also- re read the manual and with glass off power game down and change the setting to some other and see of you can get it to light up by running up score or bonus or whatever. I have mis-interpreted the settings once or twice myself. The manuals are ok but not always totally clear if you in a hurry and dont do this every day.