A digital photo before you remove the PCB will give you confidence but I doubt you will need to refer to it.
1) Turn off power
2) Remove lower cover - single screw underneath
3) Drop down hinged plate - single
4) Remove connections
5) Ease PCB off corner posts
6) Reverse order with new board
Peccavi
November 2010
I can answer this question...
how can i install a new circuitboardto potterton profile407677?