79 service error
Moderate
HP · Printers
Printer encountered a fatal firmware exception and restarted.
Quick Answer
Error code 79 Service Error on your HP Printers means: Printer encountered a fatal firmware exception and restarted.. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Power cycle printer and disconnect network cable.
2
Boot and print internal reports.
3
Update firmware to latest revision.
4
Reconnect network and test with different driver.
5
Remove optional memory/accessories to isolate fault.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
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