We bought a KD-55XD9305 about 6 months ago. Tonight it is doing nothing when we try to turn it on using the remote. No lights flashing, nothing, it's like the TV is completely dead. This happened once before and following the troubleshooting instructions in the manual I turned it off at the mains and on again and this resolved the issue. Tonight we have turned off and on at the mains, checked the wires into the back of the TV, tried the on/off switch on the TV itself, and have changed the batteries in the remote. Still nothing at all happening. Attached sound bar turns on and off no problem.

Can anyone please advise or help? Many thanks.