Troubleshooting 3 Blinks Error Code - Panasonic TC-P54Z1 Technical Manual

Troubleshooting 3 Blinks Error Code

These 3 conditions can cause the TV to shutdown and the power LED to blink 3 times
1. Missing P3.3V
2. A short of the P3.3V
3. Wrong diagnostic by the DA board
When troubleshooting a PDP TV that is shutting down and the power LED blinks 3 times:
Find out if 3.3V is output at R126 (R17126 on the service manual) . If 3.3V is present, it's likely that the
DA board is defective.
If no voltage is output, determine if this is caused by the P board or the boards using the P3.3V.
To check for a short circuit, measure the resistance between R126 on the C1 board
ground (Chassis). If P3.3V is shorted, find out if the short is coming from the DA board or if it's coming
from any of the C boards or the panel.
The defective board is found when the connector that provides the P3.3V to that board is removed and
the short circuit is no-longer present.
The boards that can possibly cause the TV to shutdown with 3 blinks of the power LED are:
DA – 80% Probability, Panel – 70% Probability, C2 – 50%, C1 – 5%, C3 – 5%
(See figure ?) and
Slide #66