Worcester Danesmoor 26/32 - can't reset clock etc?

Hi, I had a power cut & when I tried to reset the clock & reprogram the boiler using the digital display the programming & clock buttons wouldn't work. My display is flashing what looks like JJJJ and I can't stop it with any combination of button pressing. I can get the boiler working manually by pressing SELECT but can't program it to come on or switch off automatically. Any help would be massively appreciated.