![background image](https://i.printerdoc.net/HP LaserJet 3030 All in One Printer/en/HP LaserJet 3030 All in One Printer_en132.png)
Is your computer set for bidirectional communication?
See the documentation that came with your computer to change the basic input/ouput settings
(BIOS). The recommended bidirectional setting for the parallel port is ECP. The USB
connection is always bidirectional.
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Chapter 8 Troubleshooting
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