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TH-55VF1HU, TH-55VF1HW (serv.man2) - Panasonic TV Service Manual (repair manual). Page 24

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INF-16
SECTION 1 SERVICE INFORMATION
<55VF1H>
4.3. Troubleshooting flow
4.3.1. No power
11
 
5. Troubleshooting Guide 
5.1 No Power 
 
 
 
 
 
No power (LED “Off”) 
Check the AC input and 
the power is “ON”? 
Power “On”
Power board CN903 Pin 
2/4/6 output=5V? 
Replace the Power board 
Yes 
No
Yes 
No
Use RC or Key to turn on
the PD 
No 
Yes
1.  RC can turn on the PD and Key can’t, 
replace the key board. 
2.  Key can turn on the PD and RC can’t, 
replace the RC. 
Replace the Main board 
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