Sony KDL-40HX750 Service Training Manual page 24

No Power
Remove AC power and
wait at least 30
seconds before
reapplying
Does red
Standby LED on
front panel light?
No
Is Standby LED
blinking?
No
Power Supply
Board*
*For Part Number information, Refer to "Section 4 - Disassembly/Part Number Information" on page 19.
KDL-40HX750/46HX750/46HX751/55HX750/55HX751
SECTION 3 - FLOW CHARTS AND DIAGRAMS
Yes
See
Yes
Protection Shutdown
flowchart
High (>2.5V)
Yes
on pin 27 of CN6401
on power supply?
No
Power Supply
Board*
NO POWER FLOWCHART
Press power
button while
monitoring pin 28
of CN6401 on
power supply
board
High (3.3V)
Yes
appears
momentarily?
No
Main Board*
Power Supply
Board*
14