Who can say what is wrong with your machine? You just say it stopped working and give no further information about the fault(s).
The change of the pump and the circuit board at the same time may be legitimate - the pump may have failed and just might have damaged the circuit board but I doubt it - when an appliance fails it's usually just down to one broken part rather than two.
It may be that with the second fault the circuit board (pcb) really is faulty but without any details nobody here can say one way or another - either you trust the engineer or you do not...
A new circuit board might fail in one or two days so your 7 months is neither here nor there. I have never had to have a circuit board replaced in any washing machine I have owned since 1968 - you may just be unlucky.
If I were you I might think about another service supplier and do not be frightened to ask about the fault finding process - the evidence and their conclusion - challenge them (gently) to demonstarate the logic of their diagnosis - it is after all - your money.
Good luck...
Peccavi
December 2009