hello all, i have a baxi 105e combi and had a leak from the seal where the pipe enters the c/h heat exchanger, i removed the heat exchanger and replaced the o rings in each side. after replacing the heat exchanger i now have no leaks but boiler will not work, as the water from the leak had dripped down over the controls and i presume the pcb do you think this could be causing the problem, the only thing showing is the green power light to indicate power to boiler, tried resetting the boiler but no joy, everything was fine before this happened, all advice gratefully accepted, many thanks.