KDL-55W805A - Sony TV Service Manual (repair manual). Page 14

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KDL-55W805A 10
SECTION 2 - TROUBLESHOOTING
 
*For Part Number information, refer to 
“Section 4 - Exploded View/Part Number Information” on page 19
.
NO VIDEO FLOWCHART
No Video
Backlights 
turned on?
Sony logo 
appears 
momentarily?
No
Main Board*
No
Yes
Yes
LCD Panel*
Locate 
CN6401 on 
Power
Supply Board.
Zero volts at 
Pin 2?
TCON*
(LCD Panel)
Yes
No
Zero volts at 
Pin 5?
Yes
Main Board*
No
LCD Panel*
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