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Hello, I own a Panasonic TH-42PZ77U (purchased from Sears 12/2008 - still under warranty) and the unit will not power on. The red LED light on the front of the unit blinks 7 times which is a service code meaning a power supply problem based on my own resaerch. Panasonic has not replied to my emails and their phone always has a busy signal 888-843-9788. Please help. Thank you, Brad Holcomb 414-615-2757

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Thank you for the reply. I called Panasonic Consierge 800-973-4390 and they set up an in home service call for free - my TV is under warranty.

Posted on Jul 08, 2008

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Hi, Approximately eighteen months ago, I purchased a 42 inch plasma Panasonic television model number: TH-42pz77u) but Saturday night, the television turn off and have five blinking red lights. Then we...


The 5 blinks on the LED means that the main logic D board is defective and will need to be replace to fix the TV.
Check this site to find replacement parts to fix your plasma if you intend to DIY.
Let me know if you need further assistance.

Jan 15, 2011 | Panasonic Viera TH-42PX80U Plasma TV

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Panasonic model th42pz77u no pic, no sound, blinking red light ten times


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.
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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.

Aug 16, 2010 | Panasonic TH-42PZ77U TV

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TURNS ON THEN OFF, RED LIGHT BLINKS 7X


replace sc board and do firmware update or problem will come back!

Oct 24, 2009 | Panasonic TH-42PZ77U TV

1 Answer

Watching dvd, great pictue and all of a sudden black out


7 Blinks is the failure of the SC/SU/SD PCB's (1 2 or 3 depending on how lucky/unlucky) you are.

Panasonic have a great warranty usually. Give them a ring, it has failed.

The flashing LED is the fault code.

Sep 06, 2009 | Panasonic TH-42PZ77U TV

1 Answer

Blinking red light of death


The most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

Jun 28, 2009 | Panasonic TH-42PZ77U TV

1 Answer

(panasonic TH-42PZ77U plasma) the tv will power on but before the picture comes up it powers back off. Red power light is flashing.


in protective mode the tv does not turn on and light is blinking, typically we must proceed by elimination as some faulty sections are preventing the tv to switch on. unplug the output power connectors from the power supply until the latter stop clicking. if it is still clicking after every of the output rail have been disconnected, then the power supply itself is faulty.

hope this helps!

Mar 21, 2009 | Panasonic TH-42PZ77U TV

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Panasonic th-42pz77u 42ed


Pin 93 of the MPU IC9003 monitors the status of the SC, SU, SD board. During normal operation, the photo-coupler PC6480 outputs a low to pin 93. If the SC, SU, or SD board becomes defective, a high is provided to pin 93. As a result, the unit shuts down and the power LED blinks 7 times.

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