Specifications

26 T
ROUBLESHOOTING
P
RESARIO
N
OTEBOOK
M
AINTENANCE AND
S
ERVICE
G
UIDE
1400 S
ERIES
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
continuous pattern
across it (for example,
“jailbars” pattern), has
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.
Improper display cable
connections
Reseat the display cable to the
system board and the display
assembly until the problem is
solved.
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
group of lines, or block
appears on the display
panel. This failure
occurs in only one
section of the display
panel.
Defective display panel Replace the display assembly.
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.