Glow worm 30cxi?

Hi all, basically im on a key meter and ran out of gas so i turned the boiler off untill i could renew the gas key in the morning. Put the gas on then turned the boiler back on to it not coming back on at all no display nothing. I read up that it could be the pcb so i bought 1 off ebay with 12months warranty fitted it and now the clock comes on and the fan whirls for a few seconds but doesnt ignite the boiler plus the bar pressure display doesnt come on. Did i buy a dedectife pcb or is it something else??