POS machine simple fault check and elimination

What should I do if the POS machine suddenly appears abnormal?

For merchant friends who use POS machines, we have summarized some common faults of the machine for your reference. Due to the different models and brands in different regions, we can't summarize everything, so we can only share common problems and solutions.

Simple check and elimination of fault phenomenon

No display on the screen Check if the power connector of the card reader is plugged in, whether the plug is loose, or if the transformer connector is loose. Move the power plug of the card reader to another socket. Try the printer jam. If there is any foreign matter in the guide, please twist the foreign object clearing bill. Please tear off one and try again (limited to two, triple billing)
Print blank paper face re-loading card machine power re-insertion and try again Can not print the printer cover to determine whether it is covered (thermal type)
Whether the bill has been installed and the power card is re-inserted and try not to brush the magnetic stripe card. Please pay attention to whether the black stripe of the card is correct. The card is re-inserted and the card speed can not be too slow. The magnetic strip may be damaged. Replace one. Try again, "The phone line is not connected" or "The line is bad, please try again"
Please check if the telephone line is disconnected. The connected telephone is not connected. The audition is connected. The telephone has a dial tone communication error. Check if the call is “forgotten to pay, suspend use, or malfunction”.
If there is noise in the phone, please check with the telecommunications company to check if the telephone line has a lock. The long-distance control device checks whether the telephone line is a dedicated line or if you want to dial 0 to 9 to check the external line and check whether the telephone line is connected to the fax machine. If it is used, please fax the machine. The phone line of the credit card machine cannot use the phone number of the ADSL attached screen. The screen does not move (pressing any button has no effect)
Unplug the credit card power connector and try to checkout. Please try again and try to check out once or try the invalid transaction again after a while.
The transaction category that is not supported by the POS machine or the transaction invalid card number that is not supported by the issuing bank is not registered in the card center or the card is incorrectly read. If the card is re-brushed, it is still unsuccessful for the cardholder to exchange for other cards.
The password machine failed to enter the failed password or timed out and tried again. Press the red button on the password keyboard a few times before swiping the card to contact the card issuing bank! The operator can confiscate the network problem in the previous transaction, and if it is displayed multiple times, please contact the maintenance personnel.

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