USB Printing Problems
iMac cannot print to attached known-good printer.
- Verify that the printer is Macintosh compatible.
- Verify that you have setup the printer correctly in OS X.
- Reinstall the printer driver.
- Switch the printer to another USB port.
- Replace the printer interface cable.
- System software is corrupted. Reinstall the system software.
- Replace the logic board.
• Service Source
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