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First, after the automatic search, you need to check the name of the printer that is currently used by the printer. If not, you need to clearly run the data in the background (because it will be tested before leaving the factory), under the automatic search.
Second, after connecting, observe whether it is charging. If it is charging, check if it is the original wire. If it is not charging, unplug the OTG cable. Or the line is broken.
Third, the printer cover problem, check the printer status, such as whether the light is blinking, etc.
Fourth, the network port printer problem, if the network port printer can not connect to the printer, you need to check the IP address (turn off the printer power, press and hold the paper exit button, then turn on the printer power). Then change the IP in the advanced settings of the WLAN in the settings.
Fifth, check whether the data line used is the line that the manufacturer has equipped. The normal data line can only be charged and cannot be printed.
Troubleshooting method for connecting to the printer
Unable to connect to printer