Why does only one document cause this error?

The document contains specific data (complex graphics, unusual fonts, or PostScript commands) that triggers a firmware parsing bug. Simplifying or printing as image resolves it.

Should I replace the formatter board?

Only if the error occurs with every print job and firmware update does not help. If only specific documents trigger it, the issue is in the print data, not the hardware.

HP LaserJet Error 49.4C02 — Firmware Communication Error

Errorhp

Overview

Fix HP LaserJet error 49.4C02 indicating a critical firmware communication failure caused by corrupted print jobs, incompatible drivers, or firmware bugs.

Key Details

Error 49.4C02 is a common HP LaserJet firmware error indicating a communication breakdown
The error typically appears on the printer's LCD display and requires a power cycle to clear
It is triggered by specific print jobs that the printer firmware cannot process
Complex PDF files, PostScript errors, or driver-generated commands can cause this error
The error can recur with the same print job until the root cause is addressed

Common Causes

Complex print job with excessive embedded fonts, images, or vector graphics
Incompatible or outdated printer driver generating commands the firmware cannot parse
Firmware bug — specific print data patterns trigger the crash
Network print job corrupted during transmission
Third-party toner cartridge with incompatible smart chip firmware

Steps

1Power cycle the printer: turn off, wait 30 seconds, turn on
2Cancel the problematic print job from the computer before resending
3Try printing as PCL instead of PostScript (or vice versa) in printer driver settings
4Update printer firmware from HP's support website
5Print the document as an image: driver Properties > Advanced > Print as Image
6Simplify the document: reduce embedded images/fonts, print fewer pages at a time