Truma control panel

[solaris]

Tonight discovered that the Truma control panel screen is completely blank, no symbols at all. The boiler was repaired couple of months ago and all seemed fine except clock kept returning to zero occasionally. Can’t remove panel, it unclips at top but seems to be attached by round knob. Fortunately main control panel alongside seems unaffected.
Coincidentally booked into SMC Monday in meantime lack of heating probably not a problem, lack of hot water irritating.
Anyone any thoughts?
TIA

 

[Lenny HB]

Pull the knob off there is a screw under it that holds the panel in.
Should be a small glass fuse nearby that inline with the supply to the panel.

 

[solaris]

Lenny HB. Thanks for your swift reply. With van going in for hab check on Monday, lacked courage to attack knob. However this morning realised that fridge wasn’t working either. After a bit of checking replaced fuse labelled’ permanent live ‘ and both immediately started working. Fingers crossed.