HP LaserJet 4L - Page 220

Troubleshooting
Printer Error Troubleshooting
Table 7-16
NVRAM Error
—
LaserJet 4ML LaserJet 4P/4MP
LEDs
Disr)lav Panel
I
Description & Recommendations
,.
See Table 7-
68 ERROR
68 ERROR indicates a recoverable error in
‘1, RAMError) 68 SERVICE
NVRAM. Press Continue to clear, then check
control panel settings. One or more fields will
have been reset to factory defaults during
recovery.
68 SERVICE indicates NVRAM is full.
1. Perform NVRAM Reset to clear NVRAM
(hold down ~ key during power-on).
2. Replace the Formatter PCA.
Table ‘7-17 Blank Display
LaserJet
4L/4ML LEDs
3
$m
~m
am
Um
Ml lights off
blank display).
LaserJet 4P/4MP
Display Panel
[blank]
Description & Recommendations
If the printer’s lights remain off
(LaserJet 4L/4ML) or the message display
panel remains blank (LaserJet 4P/4MP),
check the following:
1. (4L/4ML): Printer is in Intelligent Off
mode. Press the front panel button, or open
the Top Door.
2. Power is not supplied to the printer. Check
power cord connections and power source.
3. Print an engine test print to determine if
the print engine is functional, If the testis
successful, replace the Formatter PCA.
4. Check FusesFU101 and FU201 on the
DC Controller PCA. Replace if necessary.
5. Replace the DC Controller PCA.
6. Replace the connector between the DC
Controller and the Formatter.
7-17