I have a worcester 3.5 highflow boiler which has been working fine until the other day when it went off as though there was a power cut.I have checked that the power is getting to the boiler so thats not the problem the programmer display is completely blank and despite pressing set and buttons nothing displays no lights and no ignition to the boiler. I have the part numbers for getting another programmer, but before i do could there be any other part that could cause a complete shutdown of the system? is there a circuit or process that can cut off the power supply to the programmer. Any help would be very welcome Doug48