Been off work for two days with damaged ligaments been hopping about in pain so was up early before the mrs went to work.

She got in the car and started it then ran back to the house "there is a strange buzzing from the speakers like an old modem dialing up"

erse collapsed and sprinted to the car and sure enough it was screeching, quick grab of the ipad and started googling apparently its common and happens for no reason.

To solve it you need to reset the Columbus/RNS510

Press" setup+ eject+ info and it will reset, leave it to do its stuff and it will come back on all fine.

Sweat over time to rest the foot again

Merry Xmas.

Thank god for Google! :-)