vokera compact 28 boiler?

my boiler will not ignite,I have followed the fault finding test A to the point where it (is there 230vacbetween terminals cn6.1 & cn6.2 on PCB ) the answer is no. the fault test says check and/or replace PCB, My problem is,is it the PCB or is it the ignition module,as this PCB has an ignition module that fits on to it.Please can you HELP.