HP Printer Error Code 70 — What It Means & How to Fix It

What Does This Error Mean?

HP printer error 70 indicates a fixup error — a serious internal fault, typically related to the printer's fuser or an internal memory/firmware error. On some HP LaserJet models, error 70 means the printer's ROM or firmware is corrupted. The printer cannot complete its startup self-test and is unusable until the issue is resolved.

Affected Models

HP LaserJet 4000
HP LaserJet 4050
HP LaserJet 5000
HP LaserJet 8000
Select HP LaserJet and enterprise printers

Common Causes

The printer's firmware (stored in ROM) has become corrupted
A failed firmware update left the printer in a broken state
The formatter board has a hardware failure
The fuser unit is not responding correctly during the startup self-test
A power interruption during startup corrupted the printer's boot data

How to Fix It

Power off the printer completely. Disconnect the power cord from the wall.

Wait 2 full minutes before reconnecting. This fully discharges any residual power and allows the firmware to attempt a clean boot.
Reconnect the power and try to boot the printer.

If the printer boots and error 70 does not appear, the issue was temporary. Monitor it over the next few print jobs.
If error 70 appears on every boot, check for a firmware update.

If the printer can connect to a computer, check HP's support site for a firmware update. Some error 70 issues have been resolved by firmware patches.
For HP LaserJets with an EIO card or hard drive accessory, remove these accessories.

Sometimes a failing EIO card or hard drive causes error 70. Remove any accessories and try booting with just the base printer.
If the error persists through all steps, professional service is required.

A corrupted firmware or failed formatter board cannot be fixed with a simple reset. A technician is needed.

When to Call a Professional

Error 70 is a serious fault that almost always requires professional service. For printers with flash-upgradeable firmware, a technician may be able to reflash the firmware. If the formatter board has physically failed, it needs replacement. For older LaserJet models, consider the repair cost vs. replacement cost carefully.

Frequently Asked Questions

Can I fix a corrupted HP printer firmware myself?

On some HP LaserJet models, it is possible to reflash the firmware using a USB drive. The firmware update file needs to be copied to a USB drive and inserted into the printer at startup. The exact process varies by model. If your printer is not responding at all, a technician with service tools is needed.

Is HP error 70 worth repairing or should I buy a new printer?

It depends on the printer's age and value. For newer HP business printers worth $500+, a formatter board repair ($150–$350) is worthwhile. For older consumer printers that cost $200 new, repair costs may exceed replacement value. Get a repair estimate first and compare it to the cost of a similar replacement model.

Can a power surge cause HP error 70?

Yes — a power surge or sudden power cut while the printer is operating can corrupt the firmware stored in memory. This is one of the causes of error 70. A UPS (uninterruptible power supply) or quality surge protector can prevent this type of damage. For expensive business printers, a UPS is a worthwhile investment.