Ok the buzz noise changes things somewhat.Booked into our local Auto electrician Tim. He has been at it 35 years in the same town so has a good name for himself. They have already said it could be a cluster failure, there is also a continuous buzz coming from behind the stereo even when it's turned off so maybe that could be involved with what's going on.
Hope it’s simple.
Sounds like a decent enough mechanic though who doesn’t only use a laptop to tell him what to change!
Silly question but it’s not that blower fan buzzing perhaps?