Here’s a list of things to try if your printer is printing gibberish or random characters:

1. Check your printer cables
   Make sure all cables connecting your printer to your computer are firmly in place and undamaged.
2. Check the ink or toner levels
   Ensure your ink or toner levels are not low. Replace or restock cartridges for your printer if necessary.
3. Run printer troubleshooting
   Use the built-in troubleshooting feature for your printer to check for possible glitches or hardware malfunctions and resolve any issues.
4. Restart your printer
   Power off your printer for a few minutes and turn it back on. Then proceed to print another page to check if the issue is resolved.