Question about HP Color LaserJet 4550n Printer
You can install an updated transfer belt but that is expensive.
Try this,,, it's just a kludge but it worked for me for over a year till I wore out the old belt.:
After starting the printer - and after it warms up and says Ready, Open and close the REAR door. This will cause the printer to recalibrate.
After it says ready for the 2nd time, try to print something.
Posted on Sep 04, 2009
Blank or white pages
Your software application is sending an extra page-eject
• Check the software’s printing configuration information.
There is a problem with the network configuration. Some sharing
devices on networks may generate a blank page as a separator.
• Check with the network administrator.
The printer may be feeding two or more pages at once because
the paper is difficult to separate.
The sealing tape has been left in the toner cartridge.
The toner cartridge is empty or defective.
The laser scanner door does not open properly.
• Remove and reseat the toner cartridge.
• Check the laser scanner shutter door for proper operation.
The toner cartridge guide is damaged, improperly positioned, or
There is no transfer roller voltage.
• Perform the Half Self-Test Functional Check to check all other
• Replace the transfer roller if necessary.
The high-voltage connectors are mounted on the high-voltage
power supply (HVPS) PCA and protrude into the toner cartridge
• Check the springs for functionality. Clean if dirty; replace if
defective or missing.
• The HVPS PCA is defective.
The DC controller PCA is defective.
There is no developing bias.
• Clean the HVPS contacts. With no developing bias charge,
toner is not attracted to the drum.
There is no drum ground path.
• Check the drum ground.
The laser scanner cable assembly is defective.
The page length and margins are not set correctly for the paper
size. Verify that the ribbon connector at J1307 of the HVPS is
If the HVPS has been removed recently, verify that the ribbon
connector from the DC controller PCA to the HVPS is properly
seated at both ends.
Verify that the photoconductive drum is rotating properly. Perform
the drum diagnostic test to visually observe if the drum is rotating
or using a felt-tipped marker place an index mark on the edge of
the drum outside the image area. Turn on the printer (wait for
drum rotation to occur), and then look to see if the drum has
moved. If the drum has not moved, investigate the mechanical
and electrical drum rotation circuitry and movement mechanisms.
The imaging drum shutter may not be retracting. Replace the
I hope that this helps
Posted on May 12, 2009
Replace the transfer belt. Known issue with this machine.
Hope this helps
Posted on May 12, 2009
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Posted on Jan 02, 2017
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