My Guten 40 litre conked out, have been thinking of doing the upgrade to the latest control panel and screen so not particularly worried.
What happened was I had a small leak on the tap when i got up to start the brew lost about 1/2 litre overnight gave the tap a turn and it stopped. What had me concerned was water was slowly dripping from underneath so I knew water had got into the internal part, went the full mash cycle (75 minutes) thought I was OK as the water had stopped dripping 30 mins before. Heard the unmistakable pop of a fuse blowing, from where I was standing I could see both the switch lights still on walked around the front and the screen was dead. So a tip for those single vessel owners, run a bead of silicone around the joint of the body and the housing.