HP LaserJet 4250 User Manual

Understanding accessory lights for the stacker and stapler/stacker
The following table lists errors that can occur in an accessory (such as the stacker or stapler/
stacker) and that are reported by the accessory lights and on the printer control panel display.
Accessory lights 
LightExplanation and solution
Solid green● The accessory is receiving power and is
ready.
● The stapler is low on staples.  STAPLER
LOW ON STAPLES  appears on the printer
control-panel display. Fewer than 70 staples
remain in the...

LightExplanation and solution
Blinking amber●The accessory has a staple jam.  13.XX.YY
JAM IN STAPLER  appears on the printer
control-panel display. (See the section for
this message in 
Interpreting control-panel
messages .)
● The accessory has a paper jam, or a sheet
needs to be removed from the unit, even if
the sheet is not jammed.  13.XX.YY JAM IN
OUTPUT DEVICE  appears on the printer
control-panel display. (See the section for
this message in 
Interpreting control-panel
messages .)
● The bin is...

LightExplanation and solution
Off●The printer might be in PowerSave mode.
Press any button on the printer control panel.
● The accessory is not receiving power. Turn
the printer power off. Check that the
accessory is properly seated on and
connected to the printer, without any gaps
between the printer and the accessory. Turn
the printer power on.
● The accessory might have been
disconnected and reconnected while the
printer power was on.  66.XY.ZZ
EXTERNAL DEVICE FAILURE  appears on
the printer control...

Correcting print-quality problems
This section helps you define print-quality problems and what to do to correct them. Often
print- quality problems can be handled easily by making sure that the printer is properly
maintained, using print media that meets HP specifications, or running a cleaning page.
Print-quality checklist
General print-quality problems can be solved by following the checklist below.
●Check the printer driver to make sure that you are using the best available print quality
option (see...

See Light print
(partial page)
See Light print
(entire page)
See SpecksSee SpecksSee Dropouts
See DropoutsSee Dropouts
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See LinesSee Gray
background
See Toner smear
See Loose tonerSee Repeating
defects
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Light print (partial page) 
1. Make sure that the print cartridge is fully installed.
2. The toner level in the print cartridge might be low. Replace the print cartridge.
3. The media might not meet HP specifications (for example, the paper is too moist or too
rough). See 
Paper specifications .
4. The printer might be due for maintenance. Check this by printing a copy of the supplies status page. (See 
Supplies status page .) If maintenance is due, order and install the
printer maintenance kit. (See...

2. Clean the inside of the printer and run a cleaning page to clean the fuser. (See Cleaning
the printer.)
3. Try using a different type of paper.
4. Check the print cartridge for leaks. If  the print cartridge is leaking, replace it.
Dropouts 
1. Make sure that the environmental specifications for the printer are bein\
g met. (See
Operating environment.)
2. If the paper is rough, and the toner  easily rubs off, open the Configure Device menu at
the printer control panel. Open the Print Quality submenu,...

Gray background 
1. Do not use paper that has already been run through the printer.
2. Try using a different type of paper.
3. Print a few more pages to see if the problem corrects itself.
4. Turn over the stack of paper in the tray. Also, try rotating the paper 180°.
5. Open the Configure Device menu at the  printer control panel. On the Print Quality
submenu, increase the  TONER DENSITY setting. See 
Print Quality submenu.
6. Make sure that the environmental specifications for the printer are bein\
g...

Loose toner
Loose toner, in this context, is defined as toner that can be rubbed off the page.
1. If paper is heavy or rough, open the Configure Device menu at the printer control panel.On the Print Quality submenu, select  FUSER MODES, and then select the paper type
you are using. Change the setting to HIGH 1 or HIGH 2, which helps the toner fuse more
completely onto the paper. (See 
Print Quality submenu .) You must also set the type of
paper for the tray you are using. (See 
Printing by type and size...

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