Thank you very much, VirusKiller...

It was, I've had it quite a while - over 3 years. I think it was one of the first 1600 models? Early on, something resonated/buzzed inside at certain frequencies - THAT was fixed under warranty.

I've been quite happy reading all the posts over the years and have learnt things almost daily! I thought someone could benefit from my own SW1600 experience.

Must put pen to paper more often

Markus