📞 Call 92851 49299 · Mon–Sat
/
UnitedCopier

HP error code

79Service error 79

✅ You can try a fix

What it means

A critical firmware error, usually triggered by a particular print job, a bad network packet or an add-on (memory / network card).

Common causes

  • Corrupt print job
  • Faulty memory module or network card
  • Firmware that needs updating

What you can safely try

  1. 1Switch the machine off, wait 30 seconds and switch it on again — note whether the code comes back.
  2. 2If it happened while printing, cancel the job on the computer and resend it — one corrupt file can cause a controller error.
  3. 3Unplug the network cable and switch the machine off and on; if the code clears, the problem is a print job or the network.
  4. 4Take a photo of the display and note the machine model and its meter reading before you call.

⚠️ If the code comes back after a restart, stop using the machine and call an engineer — running it on can damage more parts.

The exact meaning can vary slightly between models. Send us the model number for a precise diagnosis.

📞 CallWhatsApp