There may be several causes for error codes on your printer display. Below are some steps you can take to troubleshoot the issue:

1. Check your printer's documentation for the specific error code you are receiving and follow the recommended troubleshooting steps.
2. Turn your printer off and then turn it back on to reset it. Wait for any noises to finish before attempting to use it.
3. Check the paper type and size settings to make sure they match the type of paper and size you're using.
4. Check the ink or toner levels to make sure the cartridges aren't empty. Replace the cartridges with new ones if necessary.
5. Make sure the paper trays or drawers are properly loaded and pushed in securely.
6. Check the connection ports for any excessive dust or blockages.
7. If you are trying to print from a mobile device, check your settings and make sure the printer is properly connected.