Philips BDL4221V/00 Service Manual page 16

16
420WN6 LCD TV
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Geometric Distortion Screen not
centered correctly
Horizontal/Vertical Screen has one or
Lines more lines
Sync Problems Screen is
scrambled or
appears torn
LCD Scratched Screen has scratches
or
smudges
Safety Related Visible signs of
Issues smoke or sparks
Intermittent Problems The LCD Monitor
TV malfunctions
on & off
TV and Audio Problems
Poor TV signal Abnormal picture
reception seen from the
screen
Trouble Shooting
*Perform the LCD Monitor TV reset on "Position Settings Only"
*Auto adjust image through Menu -> Image Setting -> Auto
Adjust
*Adjust the centering controls
*Ensure the LCD Monitor TV is in proper video mode
Note: When operating in DVI mode, the
positioning
adjustments are not available.
*Perform the LCD Monitor TV reset
*Auto adjust image through Menu -> Image Setting -> Auto
Adjust
*Adjust Phase and Clock controls via OSD
*Check for bent or broken pins in the video cable connector
Note: When operating in DVI mode, the Pixel
Clock and Phase
adjustments are not available.
*Perform the LCD Monitor TV reset
* Push Auto Adjust button
* Adjust Phase and Clock controls via OSD
* Check for bent or broken pins
* Boot up in the "safe mode"
*Turn the LCD Monitor TV off and clean the screen
*Do not perform any troubleshooting steps
*The LCD Monitor TV needs to be replaced
*Ensure the LCD Monitor TV is in proper video mode
* Ensure video cable connection between computer and the
LCD monitor TV is secured
*Perform the LCD Monitor TV factory reset (via Menu ->
Factory Reset -> All Settings)
* Perform the LCD Monitor TV self-test feature check to
determine if the intermittent problem occurs in self-test mode
*The proximity of mountains or high buildings may be
responsible for ghost pictures, echoing or shadows. In this
case, try manually adjusting your pictures: see 'fine tuning' or
adjust the direction of the outside aerial.