KDL-40ZX1 (serv.man2) - Sony TV Service Manual (repair manual). Page 25

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KDL-40ZX1 (AUS/NZ)     2-8
 Button malfunction
on the TV
Check key clicking
of the unit
Check the Harness 
between B Board and 
H1L Board
Replace 
the H1L Board
H1L Board
Harness
B Board
Key
 or
H1L Board 
OK
OK
OK
NG
NG
NG
2-1-7. TV AND COMMANDER BUTTONS MALFUNCTION
1) TV button malfunction
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