It could be the battery but that's not for sure. You should measure the
voltage of the battery to find out if this might be the reason. The voltage
should read at least ~ 3.4 V (the specified voltage is 3.6V). But even other
faults are possible (e.g. broken RAM or processor or ....)

Best wishes
Dieter Doepfer

> Yes, it's an old one. So if the battery is dead then the module
> will not play back and will behave like I have explained The
> memory needs this battery even if the module is powered from the bus
>
>
> I really hope that this is the problem.
>
>
> Thanks Dieter