Sony KF-42SX300U Rear Projection TV - flashing standby LED

[simonc94]

Hi,

My Dad has a Sony Rear Projection TV that has a flashing standby LED status. Screen doesn't come on. Lamp LED is not lit. Anyone have any ideas? Or knowledge of self-diagnostics for this model? Service manual available somewhere.
He's a pensioner and can't afford the Sony Service Centre call out fees, so I want to help him out if possible.

Thanks,

Simon