Thank you Axel. Then at least the front button works as supposed to. Never really used it, but now it seems that I have to if I want to turn the amp off (and stay off) instead of standby.
Devialet Expert 220 Pro CI, Bryston BCD-3 , Roon, Technics SL 1500C, PMC Twenty5.24. Isotek, Pro-Ject Pre Box S2 Digital, Beyerdynamic DT 1770 Pro