Why is Accenta G4 LCD keypad unreadable after blown fuse?

Thanks, I tried a restart with no result, so I turned off the mains and removed the battery & checked all the fuses and all were O.K.
At this point I thought I would try a reset to factory defaults and replaced the battery in order for the system to 'see' the removal of the PA and SET connections before making the PA-SET link. On removal of the PA loop the whole thing burst into life. The changes from the factory defaults were preserved and on replacement of the PA connections all was fine. I had to re-input the time/date but all seems to be fine.
Thanks

Hitch
April 2012

Do a restart.
And check all the other fuses WITH a meter.

Alarm
April 2012