Cash register black screen troubleshooting
A. Whether there is no electricity supply. Check the power supply of the main chassis power connector and the power cable. Check whether the interface of the main chassis power supply and the power cable are loose. If the interface and power cable are damaged or broken, replace it in time. Check whether the power fan is exhausted.
B. Whether the power cable or data cable of the cash register is connected properly.
C. Whether the data cable of the cash register is broken or deformed.
D. If the cash register is working, intermittent black screen appears. This is caused by voltage instability. When the voltage is stable, it will return to normal.