HP 4550 manual Output is curled or wrinkled, Printer will not duplex

Output is curled or wrinkled

Cause	Solution
Media does not meet the specifications for this	Only use media that meets the media-use
printer.	specifications for this printer (see “Supported
	media weights and sizes” on page 67).
Media is damaged or in poor condition.	Remove media from the input tray and load
	media that is in good condition.
Printer is operating in an excessively humid	Verify that the printing environment is within
environment.	humidity specifications.
You are printing large, solid-filled areas.	Large, solid-filled areas can cause excessive
	curl. Try using a different pattern.
Media used was not stored correctly and may	Remove media and replace it with media from
have absorbed moisture.	a fresh, unopened package.
Media has poorly cut edges.	Remove media, flex it, rotate it 180 degrees or
	turn it over, and then reload it into the input
	tray. If the problem persists, replace the media.
You are printing to the top output bin.	Use other output bin.

Printer will not duplex

Cause	Solution
Printer is not recognizing the duplex printing	Print a configuration page to verify
accessory.	configuration. Set up the printer driver to
	recognize the duplex printing accessory. Verify
	that the duplex printing accessory power cord
	is plugged in.
You are trying to duplex on an unsupported	Verify that the media you are using is
media.	supported for duplex printing.
The door to the rear output bin is open.	Close the door to the rear output bin.

188 Solving problems with the printer EN