Had the same problem, Panasonic service guy said if this
unit is exposed to certain sequence of events damage to an internal part could
happen.Do not remember all details,
except that he had to replace the part in my TV and update firmware so it would
not happen again.Other family
members have the same TV so he was nice enough to update their firmware so it
would not happen to their TV’s.So
my understanding is if you have the old firmware you could be unlucky and have
this problem, and if you update the firmware before this happens you should be Ok. The new firmware prevents this unwanted sequence of events from happening.
I called Panasonic Canada support today 1800 561 5505 and they sent technician in 3 hours. He needed 30 min to fix the problem, he actually changed the part with used but fixed part from same TV. Now my TV is working properly. My TV is more than a year old but they fixed it under warranty. Great job Panasonic that was really professional.
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9.2. 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 blinks of the Power LED on the front panel of the unit. 26 TH-42PZ77U: There are different patterns for blinking light... 10 times indicate DG board problem - SUB 5V SOS, MAIN 3.3V SOS, DTV 9V SOS and Tuner Power SOS.
Ur power supply board is dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your tv power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
What I'm learning is there are several models of Panasonic TV's that have a video card that doesn't play well with HDMI applications and the end result is, you need to call this number and not only make arrangements to replace the bad board,but also this!
Your model doesn't show below,but I'd certinly inquire about the necessity of a "Firmware" update!,,,Panasonic knows FULL WELL they have a HUGE problem here!
Hope this helps!
At panasonic.ca I found the listing for the fw update under customer support-important notices
If you own a plasma TV with model and serial number within the range specified below, please contact our toll-free VIERA Concierge hotline service at 1-866-330-0014. A VIERA product expert will arrange an in-home software update for your TV at your convenience.
seven blinks on this model is the SC board. it will need a new SC board and the software update for the new board. usually only authorized servicers have the software need to do the upgrade. but if you were to contact panasonic then they might be able to have it fixed for you for free since this was a defect in manufacturing. of course this depends on how long you have had the tv.