Presario 1700 Series
Models: XL260, XL261, XL262, XL264, XL265, XL266, XL274, XL275, XL360, XL361, XL362, XL363, XL364, XL365, XL366, XL367, XL368, XL369, XL370, XL371, XL372, XL373, XL374, XL375, XL376, XL377, and XL378
Solving Display Problems (Continued)
Problem | Probable Cause | Solution |
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Internal display flashes | Using 1024 x 768 or higher |
or has garbled | resolution on external |
characters when | monitor, and have toggled |
Notebook is connected | back to internal display, |
to external monitor. | which supports up to 800 x |
| 600. |
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The light tubes on the | Improper backlight or display |
edge of the display | cable connections. |
panel do not light up at |
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all and the |
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| |
completes when the |
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unit is powered up.** |
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| Defective inverter board. |
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| Defective display cable. |
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| Defective display panel. |
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| Defective system board. |
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The light tubes on the | Defective system board. |
edge of the display |
|
panel do not light up at |
|
all and |
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Test (POST) does not |
|
complete when the unit |
|
is powered up.** |
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Backlight (brightness) | Improper display cable |
cannot be adjusted | connections. |
with Fn+F7 or Fn+F8. |
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|
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| Defective inverter board. |
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| Defective display cable. |
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| Defective system board. |
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Restart the Notebook.
Replace the display assembly.
Replace the display assembly.
Replace the display assembly.
Replace the display assembly.
Replace the system board.
Replace the system board.
1.Reseat the display cable to the system board.
2.Replace the display assembly.
Replace the display assembly.
Replace the display assembly.
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, and listening for the single or double beep.
