HP DESIGNJET 3D, Service Manual

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5. System won't boot, no
display after 5 minutes.
Fans, lights and LCD backlight
are operating
NOTE: Replacement hard drive
may take up to 45 minutes to
boot.
1. If system homes: Check LCD cable, if OK
replace LCD
2. Immediately after power-up, the LCD
backlight should turn on, then the display
pixels should all turn dark briefly before
returning to light (blank) again. If this does
not happen, then the LCD is bad. If it does
happen, then either the LCD, I/O card or
PDB could be at fault.
3. Measure for 12VDC at the hard drive. If not
present check 12VDC power supply, replace
cable or supply as needed.
4. If system does NOT home: Power on for at
least 10 minutes. If still no text, Cycle power
at circuit breaker and wait 10 minutes. If
system does not home, proceed to step 5.
5. Reseat the I/O card.
6. Connect a monitor and keyboard to the SBC.
a. Does BIOS drive listing show HD as
primary, if not reseat IDE ribbon cable
on both ends, Verify red line is to the
right.
b. Disk Boot Failure shown on monitor,
software not seeing the hard drive.
Reseat IDE ribbon cable on both ends.
Verify red line is to the right.
c. Kernel Panic Init Failed shown on
monitor. Replace hard drive.
d. If monitor displays:
/dev/hdaXX: UNEXPECTED INCONSISTENCY;
RUN fsck MANUALLY
*** An error occurred during the file system check
*** Dropping you to a shell; the system will reboot
*** when you leave the shell
- Replace hard drive
e. Disk Check Failed (CHKDSK). Replace
hard drive.
7. Replace I/O Card.
8. Replace SBC.
9. Replace PDB.
6. System powers off after a few
seconds.
1. Check for shorts in the AC input. (eg. circuit
breaker, line filter board, AC input cabling)
2. Power switch is bad, replace power switch.
3. Verify DC power supply outputs are not
shorted to ground.
7. System reaching temp, does
not go to "Idle" screen and
head hits into the right side
of the machine
1. Substrate sensor broken. System is attempting
to retract sensor. Replace the sensor.