Wrinkles or creases
1. Print a few more pages to see if the problem corrects itself.
2. Make sure that the environmental specifications for the device are being met. (See Operating
environment on page 246.)
3. Turn over the stack of media in the tray. Also, try rotating the stack 180°.
4. Make sure that media is loaded correctly and all adjustments have been made. (See the user
guide.)
5. Make sure that the type and quality of the media that you are using meet HP specifications.
(See
Media specifications on page 13.)
6. If envelopes are creasing, try storing envelopes so that they lie flat.
Vertical white lines
1. Print a few more pages to see if the problem corrects itself.
2. Make sure that the type and quality of the media that you are using meet HP specifications.
(See
Media specifications on page 13.)
3. Replace the print cartridge.
4. The fuser might be defective. Replace the fuser. (See Fuser on page 83.)
5. If the image defect persists, the mirror in the laser/scanner might be dirty. Replace the laser/scanner
(see Laser/scanner on page 86).
6. If the image defect persists, replace the ECU. (See Engine control unit (ECU) on page 88.)
7. If the image defect persists, replace the formatter. (See Formatter on page 80.)
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