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Troubleshooting
HP Designjet 4500 Printer Series Service Manual
Using the Power-up Sequence to Troubleshoot
When the Printer is powered up, it performs the Boot-UP sequence which
initializes the major components of the Printer. If for some reason the Boot-
Up sequence fails because a components has failed to initialize, the
following explanations will help you to locate the failing component:
Step Initialization Process
BULNEX KERNEL BOOT
30 rc.sysinit rerun through initlog.
29
Environmental variables PATH, NETWORKING, HOSTNAME set.
Source /etc/init.d functions.
28
Fix console loglevel.
Mount /proc.
Dismount the initrd, if necessary.
Configure kernel parameters.
27 Set the system clock.
26 Load keymap.
25 Load system font.
24 Start up swapping.
23
Set the hostname.
Initialize USB controller and HID devices
22
Set variables for options to be later used for filesystem check
Turn Off DMA on CD-ROMs
Turn On Hard Disk optimization
21 Perform file system check on root volume.
20 Update quotas if fsck was run on root
19 Setup pnp
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