Printer debug test

Updated: 11/10/2017 by Computer Hope

If you are encountering issues with your printer, using the below debug command can help you discover what issues you are encountering.

Note: With modern USB printers this debug routine no longer works and should only be used when troubleshooting older computer printers. See our printer troubleshooting steps for help with troubleshooting new printers.

  1. Type debug at the MS-DOS prompt
  2. At the - (hyphen) type in i379:

Anything less than eight for the second digit means printer error, first letter should be D, otherwise you will get an error with the printer.

1 - 0001 9 - 1001 2 - 0010 A - 1010 3 - 0011 B - 1011 4 - 0100 C - 1100 5 - 0101 D - 1101 6 - 0110 E - 1110 7 - 0111 F - 1111

Example:

d = 1101 = (1)Selected (1)No paper error (0)Printer Acknowledged (1)Not busy

Tip: To get out of the debug mode, hit "q" to quit.

Additional information

  • See the debug command page for further information on this command.
  • See our debug definition for further information and related links on this term.