Judgment and maintenance of common faults of POS cash registers
1. The machine cannot be started when the machine is turned on, and the machine power light does not light.
Check the power supply of the power strip and check if there is power in the socket.
Check if the cash register power cord is tight. If you are moving the cash register or moving the counter goods, you may encounter the cash register power cord. If the power cord is not plugged in, the machine will not start.
Please check to make sure all the cables are connected properly and turn the test on again.
Second, the machine starts when the machine is turned on, the machine power light is on, the screen is not displayed, and the hard disk light will flash after a few tens of seconds.
Check that the monitor's power switch is turned off. If turned off, the power light in the lower right corner of the screen does not light.
Check that the monitor power cord is tight. Whether the indicator light is on. (Red light means no signal input; green light means no signal input)
Check that the monitor cable is plugged in. Whether the display data cable and the host are connected properly (there are 15 hole connectors in 3 rows of rectangles)
Check that the brightness switch below the display is set to the darkest.
Third, the machine starts when the machine is turned on, the machine power light is on, the screen is not displayed, press the switch to keep power.
The motherboard is powered, but the BIOS is not turned on. Please remove the button battery on the motherboard and discharge the motherboard.
Check if the power supply supplies power to the motherboard. (Methods as below)
Power check method, disconnect the 24P connection plug between the main board and the power supply, find the PS-NO (green line) on the plug and any GND (black line), and short the two lines with tweezers or other metal conductors. Forced startup if the power supply is not faulty or the power supply is normal. (The power supply fan will start)
4. After the boot is started, the screen does not light, and the buzzer sounds an alarm.
There are usually the following:
1 long 1 short: memory or motherboard error. Try another memory.
1 long 2 short: display or display card error.
1 long 3 short: keyboard controller error. Check the motherboard
1 long 9 short: The motherboard flashRAM or EPROM error, the BIOS is damaged.
Continuously ringing (long sound): The memory module is not plugged or damaged. Please try to re-plug the memory module.
Keep ringing: The power supply and monitor are not connected to the display card. Check all the plugs.
Repeat short sound: There is a problem with the power supply.
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