HP LaserJet Pro M404 — Error codes & fixes
Troubleshooting guide for the HP LaserJet Pro M404. Diagnose an error code and find the fix.
Wi-Fi connection failure
wifi-connectThe purifier cannot connect to the app or Wi-Fi, blocking remote control and monitoring.
Source: ProductDB enrichment catalog
Confidence: 85%
Verified Aug 8, 2026
Paper jam
paper-jamThe printer reports a paper jam and stops, often from a misfeed or a stuck sheet.
Source: ProductDB enrichment catalog
Confidence: 85%
Verified Aug 8, 2026
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