Is
5 VDC present
at pins 10, 11, and 12 of
P802 on the power supply
module when AC is
applied?
Does
a 4.3 volt on off
signal appear at pin
13 of P802 when the
on/off button is
pressed?
Yes
Suspect a problem with
the standby 5 volt supply
on the power supply supply
module.
No
Is the
Power Good
(AC Detect) level
less than .07V at pin
14 of P802
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 P802 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/ No
Picture
10
