hi my indeset w123 does nothing but click when switched on?

all it does when switched on is click?, i dial up the wash select and press the power on button , then after afew moments the wash selct dial just starts going around clicking? i have cheaked for leeks, none, ive looked for loose wires, none, ive looked for blocked waste pipe,none, the motor is fine, the brain relay clicks once then the dial for wash select starts going but just clicking , any ideas? the sledge hammer of satisfaction! is geting very tempting,lol.