HELP! Vaillant combi inop. No Spark VCW GB 242EH?

I have a Vaillant Combi VCW GB 242 EH and it will not ignite,
No Spark, No Gas (No Voltage to Ignition Module for Ignition leads nor voltage to gas valve) Fan runs when Heating switched on, have replaced Flame & Spark Supervision board also replaced main elctronics board & pump replaced (partially siezed, turning slowly) Still it doesn't go! Really need some help or info with this.
Any more info required send me a message.
Thank you in advance for any replys

Paul