boiler shows no sign of life, no lights on control panel , have a live feed going into the pcb at bottom but nothing else can you avise THE make is ideal isar
may be blown fuse on pcb, faulty main pcb, faulty user control pcb or faulty wiring harness between main pcb & user control pcb.
best to get a qualified engineer in to test it out as it could either be a very expensive repair if it's the main pcb or in the case of the wiring harness, pretty cheap.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.