Toshiba 26AV52R - Dead Set

Is
5 VDC present
at pins 10, 11, and 12 of
CN8 on the main module
when AC is
applied?
Does
a 2.4 volt on off
signal appear at pin
13 of CN8 when the
on/off button is
pressed?
Yes
Suspect a problem with
the standby 5 volt supply
on the power supply
module.
No
Is the
Power Good
(AC Detect) level
less than .07V at pin
14 of CN8
when AC is
applied?
Yes No
Suspect a problem with
the power supply module.
Does
the secondary
12 volt source appear
at pin 8 of CN8 when
the on/off button is
pressed?
No
No
Suspect a problem
with the SYSCON
circuit located on the
Main module.
Yes
Yes
Suspect a
problem with the
Main module.
Dead Set
(No Sound and
No Picture or No LED)
SMART2009-LCD509-V4 Page 4 of 11