Problem with JVC head unit in 147
I'm having problems with a JVC KD-DV6201 head unit fitted in an Alfa 147. I had the unit installed and working fine, then one morning it wouldn't power up.
I know that there is power getting to the head unit: If I press the "disp" key on the front panel of the JVC the clock on the head unit would illuminate for a few seconds, then go out.
It will also accept and reject discs without any problem. It just won't turn on - with the ignition turned on or not.
I have a steering remote control fitted between the ISO connector and the JVC - I've tried removing this, and connecting the ISO directly to the head unit, but it makes no difference.
I've tried switching the red and yellow wires from the head unit - battery vs. switched 12v - it made no difference.
The original Alfa head unit (a Blaupunkt) works fine - powers up when I turn the ignition key.
The previous evening I had been trying to adjust the unit because it was protruding from the cage, but wasn't aware of damaging anything.
I returned the JVC to the supplier (it's only 2 weeks old). They say they tested it and found no problem - had it running "all afternoon" - and returned it to me.
Could anyone offer any advice/suggestions?