Roland Alpha Juno 2 Problems

Hello to all,
i have one Alpha Juno 2 which after power on jumps to Bulk MIDI Load page, with no buttons working , no way to define MIDI parameters to Load SysEx or something to it…gave it a look and reflux solder on pcb, battery has been changed , i presume it is gate array IC18 malfunction, anyone ? thank you !

Art