Compaq Presario 1800 Presario 1800XL Series Maintenance and Service Guide - Page 59

Fn+F3, Display, Problem, Probable Cause, Solutions, Restart the Notebook.

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Presario 1800 Series Models: XL180, XL181, XL182, XL183, XL184, XL185, and XL190, XL191, XL192 Display Problem Screen is blank. Display is blank and the Standby icon is flashing. Notebook display is blank and the screen on an external monitor displays information. Notebook display flashes or has garbled characters when Notebook is connected to external monitor. The light tubes on the edge of the display panel do no light up at all and the Power-On Self-Test (POST) completes when the unit is powered up.** The light tubes on the edge of the display panel do not light up at all and Power-On Self-Test (POST) does not complete when the unit is powered up.** Probable Cause Display has overheated. System is in Standby mode. Solution(s) If the Notebook is in direct sunlight, move it and allow it to cool off. Press any key or touch the TouchPad. Display function was switched Use Fn+F3 to switch between to the external monitor. LCD or CRT. The external monitor is set for 1024x768 or higher resolution and view is toggled back to the Notebook display, which supports up to 800x600. Improper backlight or display cable connections Restart the Notebook. 1. Check the display cable connections and retest. 2. Replace the display assembly. Defective inverter board. Defective display cable. Defective display panel. Defective system board. Defective system board. Replace the display assembly. Replace the display assembly. Replace the display assembly. Replace the system board. Replace the system board. **This problem indicates that the backlight or its power circuitry has failed. If the backlight is not functioning, the POST result cannot be observed. Connect the unit to an external monitor before powering up the unit. If an external monitor is not available verify that POST is complete by opening and closing the display, listening for the single or double beep, and watching for the icons to turn on at the front of the notebook. 24 TROUBLESHOOTING PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1800 SERIES

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24 T
ROUBLESHOOTING
P
RESARIO
N
OTEBOOK
M
AINTENANCE
AND
S
ERVICE
G
UIDE
1800 S
ERIES
Presario 1800 Series
Models: XL180, XL181, XL182, XL183, XL184, XL185,
and XL190, XL191, XL192
**This problem indicates that the backlight or its power circuitry has failed. If the backlight is
not functioning, the POST result cannot be observed. Connect the unit to an external
monitor before powering up the unit. If an external monitor is not available verify that POST
is complete by opening and closing the display, listening for the single or double beep, and
watching for the icons to turn on at the front of the notebook.
Screen is blank.
Display has overheated.
If the Notebook is in direct
sunlight, move it and allow it to
cool off.
Display is blank and
the Standby icon is
flashing.
System is in Standby mode.
Press any key or touch the
TouchPad.
Notebook display is
blank and the screen
on an external monitor
displays information.
Display function was switched
to the external monitor.
Use
Fn+F3
to switch between
LCD or CRT.
Notebook display
flashes or has garbled
characters when
Notebook is connected
to external monitor.
The external monitor is set for
1024x768 or higher resolution
and view is toggled back to
the Notebook display, which
supports up to 800x600.
Restart the Notebook.
The light tubes on the
edge of the display
panel do no light up at
all and the Power-On
Self-Test (POST)
completes when the
unit is powered up.**
Improper backlight or display
cable connections
1. Check the display cable
connections and retest.
2.
Replace the display assembly
.
Defective inverter board.
Replace the display assembly
.
Defective display cable.
Replace the display assembly
.
Defective display panel.
Replace the display assembly
.
Defective system board.
Replace the system board
.
The light tubes on the
edge of the display
panel do not light up
at all and Power-On
Self-Test (POST) does
not complete when the
unit is powered up.**
Defective system board.
Replace the system board
.
Display
Problem
Probable Cause
Solution(s)