Can you keep using it?
Can you keep using it?
Contact customer support if any of these apply
- !29.xx remains after all visible packing material has been removed and supplies are reseated.
- !The printer still reports a supply-installation issue with genuine Lexmark parts.
What to check first
Step-by-step checks
- 1
Consumable check
Open the supplies area and inspect the toner and imaging components for any remaining packing strips or protective pieces.
Start with the official recovery step before moving on to parts or deeper servicing.
- 2
Safe first step
Remove the packing material and reinstall the supply carefully.
- 3
Safe first step
Retry only after the supplies are fully seated and clear of shipping material.
Background
What this message usually means
Lexmark uses 29.xx as a user-attendance message when packing material is still present on the installed toner or imaging supplies. On an office mono family like MX431 and MS431, this usually appears right after installation or replacement when a shipping strip or protective piece was missed.
Before the message
What users usually notice first
Messages like this often appear after the printer fails one of its normal startup, supply, or paper-path checks and cannot return to ready state cleanly.
Diagnosis
Likely causes
Shipping or protective material is still attached to a toner or imaging supply.
A newly installed supply was seated before all packing material was removed.
A recent supplies swap introduced an installation-state problem.
Service
When service or replacement is more likely
- -This is an installation-state message first, not a defective-cartridge message.
Avoid wrong turns
Common misreads of this message
- -Treating the message like a confirmed failed part instead of a support clue about which system has stopped the printer.
- -Assuming any supply-related wording means the next step is automatically to buy a cartridge, toner, drum, or printhead.
See also
Related codes in this family
Explore more
More Lexmark printer families
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Helpful guides for this problem
Boundary
When to stop troubleshooting and move to support
Use the message once to classify the problem, then move to support if the printer still cannot return to ready after the first safe checks.
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Where to go next
Source notes
Lexmark's service manual lists 29.xx under user-attendance messages and identifies it as packing material present on supplies.
Built around official Lexmark user-guide and service-manual material for the MX431 and closely related mono office models. Exact code behavior can vary a little by print-only versus MFP model and installed options, but the main paper-jam and supply messages stay close across the family.
Printer error codes can vary a little by firmware, region, and exact model variant. Use this guide as a family-level starting point and stop if the next step would require disassembly or service-mode changes.
Known family variants: MX431adn, MX431adw, MS431dn, MS431dw, XM1342
Last reviewed: 2026-04-12
Reference: Open reference