myson orion boiler 50si not sparking

[wl66]

myson orion 50si boiler not sparking, its got new ignition board just fitted, new air pressure switch just fitted, and new spark electrode just fitted. power going to everything, the only`thing wrong is the plug from the board to the the multifunctional control valve is not passing a current through the leads to the solenoids. when its unpluged from the board and the connections on the board are tested there is power there.?? i know this would cause the pilot solenoid not to open, but would it also stop the electrode from sparking. there is power in the yellow cable and red cable to the solenoid when the fan starts running suggesting the pressure switch is ok. anyone any ideas

 

[Mikefromlondon]

If your post was in the correct section (heating and plumbing) then someone highly talented guy like Agile would have been able to help!

You sure the rats haven't chewed on a cable