I recently lucked into a Beomaster 5000 with all its matching components. (I was really just looking for a receiver to match my parents’ old Beogram RX, but hey, even better!)
The Beogram 5000 needs some TLC, but otherwise everything seems to be in fine shape, with one nagging issue: the Beomaster randomly switches to the aux/CD input, from whichever other one I’m listening to (or from standby). It’s not frequent, maybe once or twice a day, and seems unrelated to whatever the Beogram is doing at the time.
A few things I’ve noticed/tried:
Even though the input changes to aux, the Beocord tape player usually wakes up out of standby when this happens.
It isn’t the master control panel — I took the batteries out and left the system on standby for a while, and came home to it awake on aux.
Do these symptoms sound familiar to anyone? Any ideas for next troubleshooting steps? I’m leaving it now with the IR sensor covered, to see if it’s somehow getting a phantom signal, although I suspect the cause is more likely something internal.