KDL-24R425A, KDL-32R424A, KDL-32R425A - Sony TV Service Manual (repair manual). Page 13

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KDL-24R425A/32R424A/32R425A 9
SECTION 2 - TROUBLESHOOTING
 
*For Part Number information, refer to 
“Section 4 - Exploded View/Part Number Information” on page 20
.
NO POWER FLOWCHART
No Power
Is standby LED 
blinking?
No
Yes
No
See Standby 
LED Blinking
 flowchart  
Yes
Does red standby 
LED on front panel 
light steady?
Press power 
button while 
monitoring pin 4 of 
CN9101 on Power 
Supply Board.
High (3.3V)
on pin 4?
Yes
No
Main Board
High (3.3V)
on pin 1?
Yes
No
Unplug TV from 
AC power. Wait at 
least 20 seconds 
and re-apply AC 
power.
24"?
Press power 
button while 
monitoring pin 3 of 
CN9102 on Power 
Supply Board.
High (3.3V) on
pin 4?
High (3.3V) on
pin 1?
Yes
No
Power Supply 
Board
Power Supply 
Board
Yes
Power Supply 
Board
Power Supply 
Board
Main Board
Power Supply 
Board
No
Yes
No
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