HP DesignJet 500 Service Manual page 71

Symptom Call Center:
Suggestions
Main battery does Check the power source.
not charge.
Make sure the main battery is
installed properly.
Check the battery contacts. If
available, try another battery
and AC adapter.
Move the computer away
from any heat source. Unplug
the AC adapter and let the
battery cool down. Check for
blocked air vents.
Secondary battery Make sure the main battery is
module does not fully charged. If not, the
charge. secondary battery will not
charge.
Check the power source.
Make sure the secondary
battery is installed properly.
Time Remaining The Time Remaining is an
indicator is estimate based on how much
inaccurate. power the computer is using
at the moment. The estimate
therefore depends on the
current task, and assumes
that power will be used at the
same rate until the battery
runs out. So, for example, if
the computer is performing a
task requiring a good deal of
power (such as reading from
a CD or DVD), the value will
probably show too little time
remaining.
Display
Dark display, no Adjust the display brightness.
light.
Press Fn+F5 several times.
Try an external monitor.
If the display is extremely
cold, it will show completely
dark. If this happens, allow
the computer to gradually
warm to room temperature.
White display. Adjust display brightness.
Erratic display.
Bright or missing See quality statement on
pixels or lines. page 5-2.
HP Omnibook 500
Repair Center: Repair Center:
Likely Causes Comments
Battery or contacts. Check the main battery and
AC adapter.
AC adapter.
Check the heatsink/fan.
Motherboard.
Heatsink/fan.
Secondary battery Check the secondary battery
module. and AC adapter.
Expansion base.
Display cable Reprogram the EEPROM—
connection. see page 2-20.
Display assembly. Check the cable connection.
Motherboard. Replace the display
assembly.
If an external monitor
displays no image, replace
the motherboard.
Display assembly.
Motherboard.
Display cable Check the display cable
connection. connection.
Display assembly.
Motherboard.
Display cable Check the display cable
connection. connection.
Display assembly. See the quality statement on
page 5-2.
Troubleshooting and Diagnostics 3-9