I opened the unit and removed the beeper, but apart from that there was nothing I could do to get rid of the problems.
So I started looking for a replacement and came across a Rosenborg 68700 which is basically a WH-1080/W-8681 MkII:
- supplied sensor cables about 10 metres long
- adjustable contrast on the console
- much improved Danish "user manual", thanks to the importer: Agimex A/S, with detailed instructions for startup, placing sensors, and troubleshooting (the international user manual is inferior and very much like the old one for my Watson W-8681)
Price: 599 Dkr / 103$ / 67£ / 80€ http://www.davidsenshop.dk/pi/AGIMEX_RO ... _2259.aspx
Manufactured in Sweden: www.termometerfabrikenviking.se, so hopefully a better build quality.
Frequency: same as the old station, 868.3 MHz, so I simply set up the new console with the old sensors and TX-unit.
No re-calibration required, and Cumulus cannot tell the difference.
So now I have an operational weather station again - and a box of spare parts