I think you will find it is settings as I said Meridan UK told me that.

BAD CODE COMBINATION is firmware issue wrong DSP code.

and

Bad EEPROM CONTENTS is wrong settings file in product.

the oly way to get rid of the 2nd is re-type and then make new settings file with the correct config program dependant on the version of software.

As the 2nd was my issue a retype fixed things then making a new settings file with the correct program worked.

To check what version sotware running in 861 press display in standby.

If 4.2 you need to use Mconfig.
If 4.1 and below you need to use legacy configuration program.

Use Legacy on a 4.2 machine you get "Bad eeprom contents"

cheers
Michael