56
HP Printer
Severity:What Does This Error Mean?
HP printer error 56 means the printer has detected an issue with an input tray or paper handling component. On many HP LaserJet models, error 56 relates to an illegal input tray type or an unsupported accessory that was attached. The printer cannot proceed because it does not recognize the tray configuration.
Affected Models
- HP LaserJet 4200
- HP LaserJet 4300
- HP LaserJet 4250
- HP LaserJet 4350
- HP LaserJet 5000
Common Causes
- An unsupported or incompatible paper tray accessory was connected to the printer
- A paper tray was not fully seated or inserted correctly
- The printer's configuration settings were changed and no longer match the installed trays
- A third-party tray accessory is not compatible with this printer model
- The printer's memory stored a tray configuration that no longer matches the physical setup
How to Fix It
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Turn off the printer and remove all paper trays.
Remove every tray, including any optional lower tray accessories, one at a time.
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Wait 30 seconds, then turn the printer back on.
Allow the printer to fully boot with no trays installed first.
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Reinsert each tray one at a time, firmly and completely.
Push each tray in all the way until it clicks or seats firmly. A tray that is slightly out of position triggers the error.
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Check that all installed tray accessories are compatible with your specific printer model.
HP tray accessories are not universal. Verify on HP's website that any optional trays you've added are listed as compatible with your model number.
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Restore the printer to factory defaults if the error persists.
On the printer's control panel, navigate to Menu > Configure Device > Resets > Restore Factory Defaults. This clears any misconfigured tray settings.
When to Call a Professional
If removing and reseating all trays doesn't clear error 56, the I/O controller or formatter board may have an issue. A technician can diagnose which component is causing the tray communication error. Repair costs vary: $100–$300 depending on the component involved.
Frequently Asked Questions
Can I use any HP paper tray with my HP LaserJet?
No — HP paper tray accessories are model-specific. A tray designed for the HP LaserJet 4000 will not work on a LaserJet 4200, for example. Always verify tray compatibility using your printer's exact model number on HP's website before purchasing an accessory.
How do I reset tray configuration settings on an HP LaserJet?
On the printer's front panel menu, go to: Menu > Configure Device > Resets. Select 'Restore Factory Settings' or 'Reset Tray Settings'. This restores default tray type and size assignments. You will need to reconfigure trays afterward with the correct paper size settings.
Why does error 56 appear after I added a new paper tray?
A new tray accessory that is incompatible with your specific printer model will trigger error 56. Even if the tray looks like it fits physically, the printer's firmware may not recognize it. Verify compatibility before purchase. If you already have the tray, check the HP support site for a firmware update that may add compatibility.