Troubleshooting A 4 Blinks Failure (2 Of 2) - Panasonic G20 Series Troubleshooting Handbook

Troubleshooting a 4 Blinks Failure (2 of 2)

See the picture on page 10 for connector's location
Start Here
Follow the procedure on slide 8 to check the Vsus, Vda, and P15V for short circuit or low resistance reading.
Yes
No
Follow the
Is there a short
Unplug the TV and disconnect SC20
procedure on
circuit of the
on the SC board. Turn the power on
slides 9~16
Vsus, Vda, or
P15V?
How many times
Replace the SC
6 Blinks 4 Blinks
is the power LED
board
blinking?
Unplug the TV and get ready to
measure the voltage at pin 9 of
connector P7.
Plug in the TV and turn it on.
Yes
No
Is there
Replace the P
Replace the A
3V
board board
present?
Note: Perform firmware upgrade after replacing the SC or SS boards
Slide 27