Panasonic OLED-201806 Technical Manual page 67

Troubleshooting for No Picture and No OSD (Power LED is lit = No blinking)
< F4/FS/FX series >
Try the "LCD Panel
Test Mode"
(refer to P.19)
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. FX600* series
(*) The voltage of VLED is different by the LCD panel.
Refer to the block diagram of "Troubleshooting for LED Blinking (1 time blink )" page
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 A15or16or19
connecter(FFC cable to
Panel). Check if voltage
SRV-12V (PNL12V) in A
board
Replace LCD Panel
(T-CON part)
Or sound check with TV mode
No lit
(no TV
sound)
Check if voltage VLED (*)
at SRV-LED in P board
Lit
(sound is OK)
Replace LCD Panel
(Backlight part)
No
Yes
Replace A board
(12V)
Green LED
No
Replace P board
Yes
LCD Module
T-CON
A
A16
44-51
IC5260
PNL12V
12V
A02
1
2
3 Panel_VCC_ON
4
IC8000
No
Picture
SRV-12V
67