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Printer issues cause the most day-to-day support tickets. This page walks through the top failures and their fixes.

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Overview

Common symptoms:
  • Printer prints nothing
  • Printer prints garbled characters
  • Only some terminals can print
  • Paper feeds but no ink appears
  • Duplicate prints

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Diagnostic steps

Diagnostics

Printer diagnostics

Thermal printers use heat, not ink. “Paper feeds but no printing” usually means the paper is loaded upside down.

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Tips & best practices

Keep two rolls of paper at every printer and a spare printer for busy venues. Downtime is your enemy.

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Common mistakes

Do not clean thermal print heads with alcohol wipes carelessly — damaged heads print with faint lines forever.
Last modified on July 19, 2026