TITLE
Service Manual
LCD TV For 237-T11
Doc No.
SM_237-T11_19Nov07
Version
1.2
Page
16/72
Company Confidential-DRAFT
4-4 Image Abnormal Display
No picture through
component
Replace System
board
OK
1. Reconnect cable
2. Replace cable
3. Change source
settings
4. Change TV input
Fail
Image abnormal display
Fail
No picture through
composite
No picture through
S-Video
No Picture through
Tuner
No picture through
HDMI
No picture through
VGA
Replace System
board
Fail
1. Secure connection
2. Change PC resolution to
fit the timing table
3. Replace VGA cable
OK
Test
Finish
Trouble Condition
Check Item
Replace Material
Test
Step1
：
1. Check if VGA cable
is loose.
2. Make sure the PC is
set to a resolution the
TV supports
3. Check both ends of
VGA cable for broken
or loose pins.
Step2
：
Check component J4 on
system board for a short
& component U26 that
stores EDID information
for a short.
Step2
：
1. Check System Board
component L52, L49 L53, L50,
L54, L51 for a short.
2. Check System Board
component L65, L68 for a short
3. Check System Board
component L59, L61 L62, L60
for a short
4. Check System Board
component U103 for a short
5.
Check CN9 broken
? , D41
lighting? & U60 EDID OK?
Step1
：
1. Check video cable
connection
2. Check video cable
3. Check source settings
4. Check TV input
Fail
Note: Before
proceeding
confirm that Power
cable is connected
and that proper
voltage is being
fed to TV. (Check
power switch
located next to
power input and
confirm that it’s
ON.)
Note: Before proceeding make
sure the PC is not in standby or
hibernation mode. Make sure
the video card is secure and not
loose (AGP or PCI slot).
