1. Check the printer equipment and paper: Make sure that your printer equipment and paper are in normal working condition before printing. Check the printer for any faults or fault codes, and make sure to use the correct type and size of paper.
2. Clean the printer and print head: If the print head is polluted, it may lead to paper jam and black. At this time, you can clean the printer and print head with a cleaning cloth or cleaning liquid and make sure that they are dry before use.
3. Change the print quality setting: If the printer jams and displays black, it may be because the print quality setting is incorrect. Please try to choose a suitable print quality setting before printing, and check whether the shadow or depth in the setting has been cleared.
4. Replace printer ink cartridge or toner: If your printer uses ink cartridge or toner, it may need to be replaced to resume normal printing operation. Please refer to your printer equipment manual for the correct replacement procedure.
5. Reinstall the printer driver: If your printer device driver is out of date or damaged, this may cause some abnormal problems, including paper jam in the black printer. At this point, you can try to reinstall the latest printer driver and make sure it is compatible with your operating system.
These are several possible solutions. You can choose the one that suits you according to the brand and model of your printer. If the problem persists, please contact your printer manufacturer or consult technical support directly.