Toshiba 40RF350U Service Manual page 11

Is
Yes
5VDC present at pin 12
of P811 with the unit
plugged in?
Suspect the
system
control
(SYSCON)
circuit.
© 2007 Toshiba America Consumer Products, LLC.
No
Is
Yes
5VDC present at pin 1
of P806 when the unit is
plugged in?
No
Suspect the
Low B supply
circuit.
Dead set – no
sound or picture
Does
Yes
3 VDC appear at pin 3
of P806 when on-off
is pressed?
No
Suspect the main
power supply, then the
Low B supply circuit.
Suspect the
main power
supply
circuit.
10
Are
any problem
No Yes
LED indications
exhibited after the
power button is
pressed?
the LED blink
chart to help
locate the
problem.
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