Credit card swiping shows that the terminal is frozen.

Physical connection problem, virus infection.

1. Physical connection problem: the credit card swiping shows that the terminal is abnormally connected to the power supply, which causes the terminal to freeze. Users can change the power supply or wires to solve the problem.

2. Virus infection: The terminal is frozen due to virus or other malicious software, and users can scan the terminal comprehensively with antivirus software.

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