Fixing LaserJet Faded Print and White Streaks for HP DeskJet 4122
Symptoms
- - White vertical streaks down the middle of pages
- - Faded printing even with high toner levels
- - Gray background haze on clean white pages
Common Causes
- - Toner powder settling unevenly inside the cartridge hopper
- - Dirty optical scanner window or LED array
- - Imaging drum worn out or exposed to bright light
Step-by-Step Fix
Fixing LaserJet Faded Print and White Streaks on HP DeskJet 4122. Follow the sequence below and stop if the device shows a hardware warning or electrical fault.
Redistribute LaserJet Toner Powder
Open the LaserJet front door and pull out the toner cartridge. Gently rock the cartridge side to side 5 or 6 times. This redistributes the toner powder, correcting horizontal fade spots.
Never use alcohol or solvents on green imaging drums, as it dissolves the photo-conductive outer coating and ruins the drum permanently.
Clean the Imaging Drum and Charging Roller
Do not touch the green/blue shiny drum cylinder with your hands! If it is dirty, clean it carefully with a completely dry lint-free microfiber cloth to remove residual static toner dust.
Perform Fuser Cleaning Cycle
Go to Printer Settings > System Services > Service > Cleaning Page. Feed a sheet of heavy premium paper. The printer will heat up and pull dust off the fuser rollers.
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