CXA61/81
Four quick flashes with long pause between flashes
Try this solution
Check all loudspeaker connections before attempting to switch the unit out of Standby
There may be a short circuit between the loudspeaker terminals.
During power up from Standby CAP5 performs a check on the loudspeaker terminals to see if a short across the terminals has been accidentally introduced. If the resistance measured across the loudspeaker terminals is too low the unit will stay in Standby mode until the fault has been removed and Power up is re-attempted.