Hi, I have a Raymarine RC400 portable chartplotter. It has worked well for 3 years but now gives me the following message "System Halted. Error code: 0x8105. Please provide the above code to service. Keep pressing 10 seconds the POWER key to restart system". This does nothing; the error reappears. Does anyone have an idea? Thanks, Geoff.

GPS - Raymarine - RC400 GPS Receiver