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Troubleshooting for No Picture and No OSD (Power LED is lit = No blinking)
Refer to the block diagram of "Troubleshooting for LED Blinking (1 time blink )" page
Try the
"LCD Panel
Test Mode"
No Picture
Is the power LED situation
changed after pushing the
button for entering Test
Mode?
No change
(LED keep lit)
Replace A board
If entering the test mode,
the Power LED will Blink(except TC- model)
or OFF (TC- model).
Ex. 49/55EX600** series
*
(
) The voltage of VLED is different by the LCD panel.
Patterns are
displayed
Replace A board
LED blink (except TC- model)
LED off (TC- model)
Check if the Backlight is lit.
(open the back cover and
check from back side)
Confirm(Clean) the flat
cable connection
(between A board and T-CON
board of LCD Panel)
Disconnect A15/16/19
connecter(FFC cable to
Panel). Check if voltage
SRV-12V (PNL12V) in A
board
Replace LCD Panel
(T-CON part)
No lit
Check if voltage VLED
(110-132V
in P board
Lit / OLED model
Replace LCD Panel
(Backlight part)
No
Yes
Replace A board
(12V)
No
*
Replace P board
) at SRV-LED
Yes
LCD Module
T-CON
A
A16
IC5260
PNL12V
12V
A02
1
2
3
Panel_VCC_ON
4
IC8000
44-51
SRV-12V
58
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