Hewlett-Packard M3035 - LaserJet MFP B/W Laser Service Manual
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Brand: HP
Category: All in One Printer , Cooktop , Printer
Type: Service manual
Model: HP M3027 - LaserJet MFP B/W Laser , HP M3035
Pages: 368 (12.5 Mb)
Service mode functions
Boot-up key sequences
Use boot-up key sequences to accomplish the following service functions:
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Select language.
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Cold reset. A cold reset unlocks menus that have been previously locked and sets all control panel
menu items (including EIO settings) back to the factory defaults. However, it does not clear the
values in the SERVICE menu (such as the serial number and page counts).
NOTE Before performing a cold reset, print a configuration page (see Use information
pages on page 45). Use the information on the configuration page to reset any customer-
set device configuration values that the cold reset procedure changes.
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Embedded LAN enable.
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Embedded LAN disable.
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Initialize disks.
CAUTION A hard-disk initialization erases and reformats the device hard disk. Perform a
hard-disk initialization only if an error code on the control panel indicates a disk error. Always
try initializing the hard disk before replacing it.
NOTE Before performing a hard-disk initialization, print a configuration page (see Use
information pages on page 45). Use the information on the configuration page to reset any
customer-set device configuration values that the hard-disk initialization procedure
changes.
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Skip disk-load. When the power is turned on the device begins the power-on sequence. By
performing a skip disk-load, you can cause the device to resume the power-on sequence but not
to recognize the hard disk. This can be helpful in isolating hard-disk errors.
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NVRAM init.
CAUTION Initializing the NVRAM resets the event log, the page counts, and embedded
EIO and resets service menu values to factory defaults. NVRAM initialization does not reset
the model number, serial number, service ID (born-on date), usage data, or the error log.
Use the service menu to restore the serial number and page counts. Also reconfigure any
computers that print to this device so that the computers can recognize the device. Initialize
the NVRAM only when absolutely necessary. In most situations, use a cold reset rather than
a NVRAM initialization to reset device settings and retain the values in the service menu.
NOTE Before performing a NVRAM initialization, print a configuration page (see Use
information pages on page 45). Use the information on the configuration page to reset any
customer-set device configuration values that the NVRAM initialization procedure changes.
Take special note of the total page count, maintenance count, and the serial number.
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Skip calibration.
226 Chapter 6 Troubleshooting ENWW