Thanks HPsauce, I'll try a flashing from the recovery utility. The German language flash didn't work either.
Edit: Flashing with the recovery utility seems to work fine, erasing EEprom, Writing firmware, Verifying EEprom all complete sucessfully. Then no access to router, no ping, no web page.
Power LED is on, LAN LED flickers with traffic and goes off if I disable PC LAN connection. All should be good???
I am starting to get demoralised.