First check if there is a scanning sound when scanning, that is, if the scanning barcode is correct, there will be a "drop" sound, if there is no "drop" sound. Just do the following
1. The scanner is not operating correctly, and the scanning distance is too close or too far from the barcode.
2. The scanned bar code system is not turned on in the scanner.
3. The barcode itself is not clear, damaged, and printed.
If there is a "drip" sound, then do the following
1. Check if there is a problem with the data cable. Try changing a data cable
2. Whether the scanner is a serial scanner, the serial scanner needs to be tested in the HyperTerminal.
3. Whether the port, baud rate, etc. of the HyperTerminal are set correctly.
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