TITLE
Service Manual
LCD TV For 237-T11
Doc No.
SM_237-T11_19Nov07
Version
1.2
Page
12/72
Company Confidential-DRAFT
4. Trouble shooting flow chart
4-1 Display Problems
Note: Refer to the Wiring Diagram during troubleshooting for a visual of inter-connections when
indicated by this symbol
.
Trouble Condition
Check Item
Replace Material
Test
Display Problems
Abnormal display
1. No video Image
2. Video noise
3. Display flashes
4. Abnomal color
Bright spots
Dark spots
Backlight
uniformity
Light leakage
Spot & Simi
Ghosting
Dust & Scratch
Replace System
board if voltage
is missing.
Step1
：
1. Check for a loose video
cable connection
2. Check video cable
3. Check source settings
4. Check TV input
1. Reconnect cable
2. Replace cable
3. Change source
settings
4. Change TV input
Test
Finish
Step3
：
1. Check System board
CN1-pin1 to ground = 5V,
pin3 to ground = 5V or
D4, D64 lighting
2. Check System Board
CN2-pin2 to ground = 12V
Step2
：
Check for a loose or broken
connection between
Con.J11from system board
to Panel LVDS connection.
Secure connection
or replace the
LVDS wire
Step1:
Check damage to
panel
Replace Panel
Fai
l
ai
Fai
l
OK
OK
Fai
l
Fai
l
Step2:
Check for a loose or
broken connection
between Con.J11from
system board to Panel
LVDS connection.
Fai
l
Replace LVDS
connect wire
OK
