Sharp UP-3500 UP-3500 Operation Manual - Page 265

12 Operator Maintenance In Case of Power Failure When power is lost, the POS terminal retains its memory contents and all information on sales totals. • When power failure is encountered in the POS terminal idle state or during an entry, the POS terminal returns to the normal state of operation after power recovery. Before Calling for Service The malfunction shown in the left-hand column below, labeled "Condition," does not necessarily indicate functional faults of the terminal. The condition listed is only meant to be a reference for the items shown in the "Checking" column at the right before calling for service. Condition The power indicator is not lit. Checking • Is power supplied to the electrical outlet? • Is the AC power cord plug removed or loosely connected to the electrical outlet? • Is the AC adapter connector removed or loosely connected to the AC adapter jack? 263