Panasonic DLP PT-52DL52 Service Manual page 39

9.6. LED check
1. Turn on the main power switch.
2. Confirm that the front LED indicators look as follows.
POWER LED flashes in green.
(It may take longer time if the lamp failed to turn on.)
3. Confirm that the indicators change to follows approx. 10 seconds
later.
POWER LED lights up in green.
4. Turn off the power with remote controller power key.
Confirm that the LED indicators look as follows.
POWER LED flashes in orange.
5. Confirm that the indicators change to follows approx. 90 seconds
later.
POWER LED lights up in red.
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