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TH-55VF1HU, TH-55VF1HW (serv.man2) - Panasonic TV Service Manual (repair manual). Page 26

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INF-18
SECTION 1 SERVICE INFORMATION
<55VF1H>
4.3.3. No display
13
 
 
5.3 No Display 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Check the P/S and 
ON/OFF 
signal is available? 
Replace main board
Replace the power board
Panel Vcc Pin 
37/38/39/40= 12V? 
Replace the Panel 
No display 
(LED No power) 
Replace the main board
Check the backlight is 
 “On”? 
Check the LVDS cable 
Reinsert or replace the 
LVDS cable 
Replace the main board
Replace the Panel 
 
No
Yes
Yes 
No
Yes
No 
No
Yes
Yes 
No
Yes 
No
 
Power board   
CN903 Pin 33/34/35/36=5V 
CN904 Pin 1/2/3/4/5=24V 
Check PD is under control and power 
on/off by remote control and 
power key? 
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