How to mend my AEG t37400 lavatherm dryer?

I have a t37400 lavatherm dryer. The light inside still comes on, the main power button light still comes on and the door closes and the latch is working.

When I move the dial to the program and then press 'start' the dryer doesn't start. (normally this lights up but doesn't anymore) There is no sound, no smell or anything. There are three buttons which normally light up, start, buzzer and low temp but when pressing these no longer light up or seem to be working.

Any ideas?