When I turn on the TV the backlights flash on for a second and go out, I get the Vizio logo on screen for that short time. It passes the flashlight test.
Will a bad backlight cause this shutdown or should I be looking at the power board.
CN301 CONNECTOR
Readings as follows
VLED1-1+ 125 volts then drops to 0
VLED1-1- 0 volts
VLED1-2+ 0 volts
VLED1-2- 109 VOLTS THEN DROPS TOO 0
VLED2-1+ 105 volts then drops to 0
VLED2-1- 0 volts
VLED2-2+ 0 volts
VLED2-2- 130 volts then drops to 0
CN201 reading seem right, will post if needed.
Looking online at replacement boards I see near connector CN301, i'm guessing these are
high voltage safety capacitors ??. There are 4 near the connector and 2 more behind them.
I see some used boards with yellow ones, with numbers F105k 450mpb. On mine they are
black with or gray with MPHB 105k.Could the yellow ones be an improved version and could
these posssibly be the problem?
Will a bad backlight cause this shutdown or should I be looking at the power board.
CN301 CONNECTOR
Readings as follows
VLED1-1+ 125 volts then drops to 0
VLED1-1- 0 volts
VLED1-2+ 0 volts
VLED1-2- 109 VOLTS THEN DROPS TOO 0
VLED2-1+ 105 volts then drops to 0
VLED2-1- 0 volts
VLED2-2+ 0 volts
VLED2-2- 130 volts then drops to 0
CN201 reading seem right, will post if needed.
Looking online at replacement boards I see near connector CN301, i'm guessing these are
high voltage safety capacitors ??. There are 4 near the connector and 2 more behind them.
I see some used boards with yellow ones, with numbers F105k 450mpb. On mine they are
black with or gray with MPHB 105k.Could the yellow ones be an improved version and could
these posssibly be the problem?
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