Why I write you should try before changing the backup battery is.
if you change the backup battery the tuning stations will be lost.
i don’t know how to explain in english correctly.
But for example you have a radio station which is really located on 89.0 you will find it after changing the battery maybe on 91.7 and so on.
if you’re fine with that no problem. But if you like to reset the tuner you have to shortcut your Beomaster.
I will not explain how to do that because if you do not really know what you’re doing you will destroy your amp instead of fix it.
if you really want to try you will find how to do that in the service manual on this side.
