If your device is too new or too old for the built-in database, the Grundig 8-in-1 can "learn" commands directly from your original remote. This requires line-of-sight between the two remotes.
Partial code match. The remote found a code that turns the device on/off but uses a different command set. Fix: Re-run the Auto Code Search, but when the device turns off, do not stop immediately. Keep pressing CH+ for 5 more seconds—sometimes the next code works fully. Alternatively, use the Manual Code Learning method for just the few broken buttons. grundig universal remote control 8 in 1 manual