recently I bought the last instrument for RB3 a second hand battery from a previous rock band. The rest of them are for RB3.
Before that, we could play the guitar, bajo, keyboard and singer with no problem at a time.
But now, one of the slots for intruments is permanently blocked, no instrument appear as selected, but when I try to plug a fourth instrument this is ignored.
For example, I connect bajo, guitar, key board y ups... the standard controller is ignored no singers allowed.
Ok, another configuration, controller (first the singers they are a little fustrated ), keyboard, guitar y ups... no bajo.
I tried a lot of combinations and ever the fourth instrument doesn't works. Of course if you connect the battery appears connected in the free slot.
We can play only in full band mode, but the singer get no score ( more fustration to them ).
Does any body know what's happening here? May I repair this somehow