Hello there, had a new baxi combi boiler put in last october and on friday night i had the heating on everything was fine then sat morning - no hot water so i had a look and the display was totally off, it wont switch on or off its like its completely dead - any ideas. i hope this isnt a major job because i only had it put in to save money as my old back boiler was costing me a fortune in repairs and .... typical