Hello satfriends !

I have problem with my DM 7020s. The box have work fine for many years with my Stab hh100 motor. Now it's very unstable. First sometime it happens that when I change channel it say that it was no service to find. Later my motor sometimes move and sometimes not. I am sure motor and LNB is ok. Tried my motor on a Humax and it work great. Now my motor not move at all on my 7020. If I try to go to 0 position nothing happend. I have flash my box with different images. Have contacted "Dream Multimedia GmbH Ersatzteile" for the shematic, but no respons. When I check my voltage from my box to LNB it's between 13-18 volt. No difference if I start the motor. If I set my antenna to Thor 1 gr. West I get all channels, So I think it is something with the part of the PSU that drive the motor. Can anybody help me or tell me where I can buy the shematich I will be very glad ! I know I can buy new PSU, but tuner is old and I will use my money to a newer box with HD later.
Many many thangs ! Sorry for bad english

Best wishes from Morten in Norway.