Panasonic TH-37PA30E Service Manual page 26

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.
8.2. No Power
[First check point]
There are following 3 states of No Power indication by power LED.
1. No lit
2. Green is lit then turns red blinking a few seconds later.
3. Only red is lit.
1. No lit
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