HP 14XL250, 14XL352, 14XL355, 14XL246, 14XL242 manual Solving Display Problems Probable Cause Solution

Presario 1400 Series

Models: XL240, XL241, XL242, XL244, XL245, XL246, XL247, XL250, XL340, XL341, XL342, XL343, XL344, XL345, XL346, XL350, XL352, XL355, and XL356

Solving Display Problems (Continued)

Problem	Probable Cause	Solution
The display panel has a	Improper display cable	Reseat the display cable to the
continuous pattern	connections	system board and the display
across it (for example,		assembly until the problem is
“jailbars” pattern), has		solved.
a single color on it, or
has garbled graphics
across the entire panel.
This failure occurs
across the entire panel,
not just in one section.
	Defective display cable	Replace the display assembly.
	Defective inverter board	Replace the display assembly.
	Defective system board	Replace the system board.
A single line, small	Defective display panel	Replace the display assembly.
group of lines, or block
appears on the display
panel. This failure
occurs in only one
section of the display
panel.

Note: To perform a “self-test” on an external VGA color or monochrome monitor,

verify the following: The screen should appear white. On the left and right sides of the screen, a narrow black border may also be present. If the display screen indicates either of these patterns, the monitor is working properly.

26 TROUBLESHOOTING PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1400 SERIES