KDL-42W805B - Sony TV Service Manual (repair manual). Page 9

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KDL-42W805B 5
SECTION 2 - TROUBLESHOOTING
TRIAGE CHART
Use this general Triage Chart to determine what may possibly be causing the error before going out to the customers location. 
1.  Confirm the symptom from the customer.
    Red Dot: (Primary) Most likely defective part.  
2.  Select that symptom from the chart.
    Blue Triangle: (Secondary) Possible defective part.
3.  Bring the primary component listed for that symptom.
5.  Chart Color Code.
No
Power
Remote
Audio
Smart 
Core
2X     3X    4X     5X     6X    7X    8X    9X   
No White 
Power 
LED
Steady 
lines or 
dots             
No Video  
One of 
Inputs            
No Video  
All Inputs            
No Remote         
Wireless 
can't 
connect  
Bluetooth 
can't 
connect          
No Audio          
No LED
MAIN BOARD
▲

▲ ▲


▲
▲


▲
▲
▲

▲
TUNER BOARD
▲
▲

▲


▲
LCD PANEL
 

▲

▲
TCON
▲

▲
▲
▲
HIR BOARD
▲
 

HSC2 BOARD
▲

LD BOARD

▲
BT BOARD

WIFI 
 Problem
POWER
AUDIO/
POWER
LD
TCON
BACK-
LIGHT
TEMP
SOFT-
WARE
4.  Follow the associated flowcharts in the Training Manual to isolate the board.
Board 
Reference

*NOTE: REFER TO LCD PANELS SERVICE MANUAL IN REFERENCE LIBRARY DATABASE FOR  
CORRECT REPLACEMENT PARTS BASED ON SERIAL NUMBER.
Symptoms - Shutdown. Power LED blinking 
red diagnostics sequences
Video
Network



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