Glow worm cxi no display or lights board check.
If there is no display, there are some other things ratherthan the boards which can take the display out.
Any of the low voltage components can also do that, so wealways say to disconnect the 3 connections on the left hand side, J1 J4 and J2and see if the display comes back, if it doesn't then you need to ease J13 offthe top centre so you can see the metal tracks underneath, and see what voltageyou are getting on the first track on the right hand side. It should be reading15-16 volts DC, this is the feed to the display board by the main board so ifyou are not getting that then it is the main board, if you are then it is thedisplay board.
Most of the time we do recommend in changing them bothtogether as some of the new software doesn't always like the old software, soeven if if you do or don't get the voltages it still might need both boardsreplacing.