Troubleshooting
Printer Error Troubleshooting
Service Errors
Service
Errors inhibit further operation of the printer until some
action is taken.
LaserJet 4L/4ML
All lights will turn on in a steady state. Pressing and holding the
front panel button will reveal a pattern on the lights. (The error
pattern will only be displayed as long as the front panel button is
held down.) Use this pattern and the corresponding reference in
Tables 7-6 through 7-15 to identify what type of service error has
occurred.
LaserJet 4P/4MP
Service messages are displayed on the front Control Panel in the
same manner as all other messages. No action is required to
display further error codes.
Table 7-6
Service Error
LaserJet
4L/4ML LEDs
El
fim
~lca
QDI
C)m
All four lights
on (without
pressing the
front t3anel
l!wiL-
LaserJet 4P/4MP
Display Panel
Description & Recommendations
Not Applicable
There is a service error. Press and hold
(LaserJet 4L14ML
the front panel button to display the error
Only)
light code. This code will be shown only
while the button is pressed, The following
tables list possible error codes.
NOTE: If no further error code is displayed,
yet all four lights remain on continuously,
power cycle the printer. If the condition
persists, replace the Formatter PCA.
7-11
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