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30" VIDEO
FLOWCHART
TMDS
Receiver
PCB
TROUBLESHOOTING DIAGRAM
Video Problem
(no video, dark,
distorted, etc.)
Check for shield
case being
touched
Directview LCD Training
Scaler
(Format Converter)
Analog/
Digital
Converter
Switch
ATSC Video In
Set the PCs video to
1280x1024@60Hz and
Video from a
and/or
change monitor driver
PC is blurry
to Digital Flat Panel
(1280x1024)
No
Video is
present but screen is
Defective lamp(s)
Yes
dark, flickering, or
or inverter
doesn't light up
No
Yes
Color beat noise
No
Cracked
No video
Yes
components or bad
solder near tuner
No
No
Check LCD
module
Problem lies
connectors and
elsewhere
main board
voltages
CIRCUIT DESCRIPTIONS
LCD
Panel
LCD Driver
(LVDS Transmitter)
De-
interlacer
NTSC
Video
S-Video
Video In
Decoder
Composite
Adjust phase in the
ClearType or activate
and/or
TV's user menu for
and/or
PC input
Check lamps and
Replace defective
connectors for signs
Yes
of being burnt out.
No
Replace inverter
Replace
Yes
components or fix
bad solder joints
27
On the PC, activate
smooth edges of
screen fonts.
lamp(s)
Circuit Descriptions
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Table of Contents
Troubleshooting
