Presario 1600XL Series
Model 1600T,
Solving Display Problems
Problem | Probable Cause | Solution(s) |
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The light tubes on the edge of the display panel do not light up at all and
Backlight (brightness) cannot be adjusted with Fn+F7 or Fn+F8.
(Continued)
Defective system board.
Improper display cable connections.
Defective inverter board.
Defective display cable.
Defective 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, listening for the single or double beep, and watching for the icons to turn on at the front of the notebook.
Solving Display Problems Continued
Problem | Probable Cause | Solution(s) |
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This display panel has a continuous pattern across it (e.g., “jailbars” pattern), has a single color on it, or has garbled graphics across the entire panel. This failure is for patterns across the entire panel (not just on one section).
Improper display cable connections
Defective display cable.
Defective inverter board.
Reseat the display cable to the following until the problem is solved:
1.System board
2.Display assembly
Replace the display assembly.
Replace the display assembly.
28 TROUBLESHOOTING | PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1600XL SERIES |
