how do i restart a comby boiler?

I switched the electricity off by accident on my boiler, now i've put it back on, you can here a noise when you plug it in but theres nothing coming on the small screen to say its working. I've phonen'd the gass and the boiler company but i haven't got after sales care so they wont help me. I dont think theres anything big wrong with it, I havent had any problems up to now. I was hoping theres just some button i have to press just to restart it. Its a WORCESTER HIGHFLOW 3.5. The screen is blank, so i dont know if its working or not.
Please help me.
jenny oliver, August 2006


done
ok i use to be in the industry of heating and air and even have a boiler license the reason they cant tell you how to fix it is because you have to be licensed to work on them and all i can tell you is that you have to get ahold of a boiler company and just have them come out and look at it if they wont tell you over the phone or if it is under warrenty have them come out and work with it but just keep buggin them more then likely you just have to wait for it to reset it would be just like a power outage but better safe then sorry

Peterbuilt Diesel Tech, September 2006
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