Panasonic TH-42PHW6AZ Service Manual page 20

11.1.2. Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an abnormality has occurred the unit, the protection circuit
operates and reset to the stand by mode. At this time, the defective
block can be identified by the number of blinkes of the Power LED
on the front panel of the unit.
18