Potterton E2000 Central heating switch?

i had a plumber to change pump and3 way port valve now my potterton e2000 does not work there seems to be no power going thre i have checked main fuses and also changed fuse on main power supply but there is no display on the clock and the pump stays on i can only swith of heating from mains any advise please

rick
October 2008

Its probably nothing to do with the time switch but is the heating zone valve

jon11
November 2007