Read Sony KLV-40S550A Service Manual online
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KLV-40S550A
RM-GA015
SECTION 3
TROUBLESHOOTING
3.1 Flowchart
3-1-1. Flowchart A(i)
No Power/Shut down/No Picture
Try On/Off at Main SW
and with Remote Commander
and with Remote Commander
Is it LED(STBY)
indicator turn on
or blinked?
Is Connection at
Wire Harness correct?
Check Harness holder, Header pin
and Wire harness.
Is it bended or damaged?
(If yes, replace it with a new one)
Count blink and replace board to
obey with 2-6 triage chart.
Refer Section 3.2 Board
Replacement Order.
Yes
No
Power source is out of order.
Other circuit block is out of order
except for Power board. Check
STBY3.3V Vcc line and circuit.
STBY3.3V Vcc line and circuit.
Yes
No
Flowchart A(ii)
NO POWER
2, 5, 7, 10, 13 blinks,
No Video/No BL, No Power
No Video/No BL, No Power
3.3V_DC
CN1300 3PIN on
BA Board
Does Power
Button work?
BA Board
Yes
Yes
Yes
AC Cable or AC Inlet
IP1F(No STBY 3.3V)
Switch Unit
No
No
No
176-264VAC
Inlet on
IP1F
Destination
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