The following table contains general information about common monitor problems you might encounter.
COMMON
SYMPTOMS
WHAT YOU
EXPERIENCE
POSSIBLE SOLUTIONS
No Video/ Power
LED off
No picture
z
Check connection integrity at both ends of the video cable
z
Electric outlet verification
z
Ensure power button depressed fully
No Video/ Power
LED on
No picture or
no brightness
z
Increase brightness & contrast controls via OSD
z
Perform monitor self-test feature check
z
Check for bent or broken pins
Poor Focus
Picture is
fuzzy, blurry
or ghosting
z
Auto Adjust via OSD
z
Adjust Phase and Pixel Clock controls via OSD
z
Eliminate video extension cables
z
Perform monitor reset
z
Lower video resolution or increase font size
Shaky/Jittery
Video
Wavy picture
or fine
movement
z
Auto Adjust via OSD
z
Adjust Phase and Pixel Clock controls via OSD
z
Perform monitor reset
z
Check environmental factors
z
Relocate and test in another room
Missing Pixels
LCD screen
has spots
z
Cycle power on-off
z
These are pixels that are permanently off and is a natural defect that occurs in LCD technology
Stuck-on Pixels
LCD screen
has bright
spots
z
Cycle power on-off
z
These are pixels that are permanently on and is a natural defect that occurs in LCD technology
Brightness
Problems
Picture too
dim or too
bright
z
Perform monitor reset on "Factory Reset"
z
Auto Adjust via OSD
z
Adjust brightness & contrast controls via OSD
NOTE:
When using '2: DVI-D', the contrast adjustment is not available.
Geometric
Distortion
Screen not
centered
correctly
z
Perform monitor reset on "Display Reset"
z
Auto Adjust via OSD
z
Adjust brightness & contrast controls via OSD
z
Ensure monitor is in proper video mode
NOTE:
When using '2: DVI-D', the positioning adjustments are not available.
Horizontal/Vertical
Lines
Screen has
one or more
lines
z
Perform monitor reset on "Display Reset"
z
Auto Adjust via OSD
z
Adjust Phase and Pixel Clock controls via OSD
z
Perform monitor self-test feature check and determine if these lines are also in self-test mode
z
Check for bent or broken pins
NOTE:
When using '2: DVI-D', the Pixel Clock and Phase adjustments are not available.
Sync Problems
Screen is
scrambled or
appears torn
z
Perform monitor reset on "Display Reset"
z
Auto Adjust via OSD
z
Adjust Phase and Pixel Clock controls via OSD
z
Perform monitor self-test feature check to determine if scrambled screen appears in self-test mode
z
Check for bent or broken pins
z
Boot up in the "safe mode"
LCD Scratched
Screen has
scratches or
smudges
z
Turn monitor off and clean the screen
z
For cleaning instruction, see
Caring for Your Monitor
.
Safety Related
Issues
Visible signs
of smoke or
sparks
z
Do not perform any troubleshooting steps
z
Monitor needs to be replaced
Intermittent
Problems
Monitor
malfunctions
on & off
z
Ensure monitor is in proper video mode
z
Ensure video cable connection to computer and to the flat panel is secure
z
Perform monitor reset on "Factory Reset"
z
Perform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode
Missing Color
Picture
missing color
z
Perform monitor self-test feature check
z
Check connection integrity at both end of the video cable
z
Check for bent or broken pins
Wrong Color
Picture color
not good
z
Change the color to "PC Custom Color" or "MAC Custom Color"
z
Adjust R/G/B value of "PC Custom Color" or "MAC Custom Color"
Page 2 of 6
Documentation
12/10/2007
http://support.dell.com/support/edocs/monitors/2407WFP/en/solve.htm
