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Troubleshooting for No Picture and No OSD (Power LED is lit = No blinking)
Refer to the block diagram "Troubleshooting for LED Blinking (1 time blink )"
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).
(*) The DC level 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
Replace LCD Panel
(T-CON part)
No lit
Check if voltage 24V/32V(*)
Lit
No
board
Yes
Replace A board
(12V)
No
at SRV-LED in P board
Yes
24V/32V(*)
Replace LCD Panel
(Backlight part)
A
IC5300
12V
A02
1
3
Panel_VCC_ON2
5
Replace P board
LCD Module
T-CON
A19
1-4
PNL12V
SRV-12V
IC8000
50
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