LaserJet 49 / 79 service error
What it is
Firmware or communication faults; a power cycle resolves many.
Why it matters
Frightening-looking code with a simple fix — ideal quick-win page.
Other HP issues
Did this fix it?
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Verified against HP LaserJet, HP PageWide - 49 Error Displays On the Control Panel, last checked 2026-08-12.