Question about Panasonic VIERA Televison & Video

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TV cuts back off after I turn it on

Then I have to unplug it, re-plug and turn it back on. Sometimes I have to do this a couple of times before it will stay on. I switched the locations of the Panasonic and an old Hitachi from bedroom to living room. The Hitachi has never had that problem in either spot.

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  • Panasonic Master
  • 74,251 Answers

It sounds that the start voltage to SMPS [Main power supply regulator board] has some problem. It should be checked. Check and replace damaged component/s at it main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis.

Posted on Apr 18, 2014

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 718 Answers

SOURCE: Panasonic 32 inch LCD TV will not turn on-red light flashing

The number of flashes is an error code. Count the number of flash. It looks like one of the boards in your set is failing intermittently. Panasonic codes for a guide as a starting point. Exact board STILL has to be verified;
One Blink: One blink of the power LED indicates a problem in the inverter circuit located on the LCD panel. The inverter board is not to be repaired in the field. Therefore a replacement is required.
Three Blinks: Three blinks of the power LED indicates an over-current or over-voltage condition in one of the DC supplies of the AP board. The AP board is repairable. Therefore the use of an ohmmeter and peak-hold-voltmeter is required to determine the cause of the shutdown. An over-voltage condition is definitely a defect of the AP board. An over-current condition may be due to a short circuit located in the AP board, A board, or the LCD panel.
Five, Seven, or Eight Blinks: The A board is responsible for five, seven or eight blinks of the power LED. The MAIN +3.3V, MAIN +5V, and MAIN +9V sources are all produced on the A board. The detection input pins of the MPU, IC1100, monitor for their presence.
Four or Six Blinks: The AP board is responsible for four or six blinks of the power LED. The DTV9V, and SUB_5V sources are produced on the AP board. The MPU IC1100 monitors for their presence when the unit is connected to AC Power. A short or open circuit on the A board may also be responsible for their absence.
Nine Blinks: Nine blinks of the power LED is due a short circuit in the audio output circuit (s) of the unit. The audio output circuit is located on the A board. Confirm the status of the speakers. If defective, perform a replacement. If ok, replace the A board.
Ten Blinks: Ten blinks of the power LED indicates a malfunction of IC4200, the frame converter. This IC resides on the A board. Therefore ten blinks of the power LED requires the replacement of the A board.

Posted on Feb 11, 2009

  • 44 Answers

SOURCE: Philips 42 inch HDTV - "FlatTV" Plasma -- does not turn on.

I had the Same issue. on a 50PF9431D/37 set. Many Plasma Set's use a LJ44-00118A PS-505-PH Power supply from Samsung. Known to have this common problem. If you can, or have a friend that can Solder components?. Unplug your set remove the back panel & locate your power supply. It will be the PCB in the center of the set just above the Video/Audio connections. http://www.shopjimmy.com/power-supply-unit-lj44-00118a-from-philips-50mf231d-40.htm. Is a Link to a photo of the PCB. Make a note of the locations of all cable connections then unplug them all. Un-install PCB, Check all Fuse first. I believe their is 5 or 6 of them on the PCB. Then replace the two 3300uf 10v 105C Radial capacitors at C8060 & C8059. Look to see if the Caps are deformed and or split at the top. The location of the caps are in the Lower bottom edge of the PCB. A local shop may Carrie them if not, digi-key has them. Part # http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=493-1754-ND. Total cost was $7 with S/H.

Posted on Jun 25, 2009

  • 1 Answer

SOURCE: My 42HDS69 Hitachi has a recurring problem of not

MY TV KEPT GETTING WORSE EACH DAY ALSO. BUY A CAN OF SPRAY AIR WITH THE EXTENSION SPRAY TUBE. WHEN YOU GET THE TV RUNNING SPRAY THROUGH THE HOLES IN THE BACK RIGHT ONTO THE FAN BLADES OF BOTH FANS. THE DUST WILL FLY OFF THE BLADES. A VACUMM HOSE WILL HELP PULL OUT THE DUST. ALSO SRAY THE POWER SUPPLY BOARD FOR DUST. I APPEARS THE FANS SLOW DOWN WITH DIRT ON THEM AND THE EXTRA HEAT BUILD UP JUST AFTER THE TV IS SHUT DOWN IS CAUSING THE POWER SUPPLY TO BE IN A SHUT DOWN MODE WHEN POWERED UP THE NEXT TIME. BEEN TWO WEEKS NOW AND WORKS PERFECTLY NOW AGAIN.

Posted on Feb 11, 2010

SOURCE: TV looses picture and sound. Will not turn back on

www.plasma-television-repair.com/Sample-Preview-Plasma-Tv-Repair-Training-Manual.pdf -
Above is a training manual, this should help you find and fix the problem if you wish to DIY. If you DO, decide to DIY, you MUST MUST get a Service Manual, for your exact make & model. it will be similar to the Training manual, but explicitly for your set. I do not recommend it however.In my professional opinion, you should contact Vizio and ask for an approved local service center, then, get a "Quote" for repair.
With faults such as this, it is important to leave them disconnected from the wall, as it is entirely possible, for a faulty, TV, to cause a fire, an explosion, or both. Anytime one hears any sort of "pop" similar or not, is grave cause for concern, as usually this means some sort of component failure, in a high voltage area.

Posted on Apr 29, 2010

  • 2 Answers

SOURCE: TV turns off by itself & won't turn back on til unplugged, then plugged back in

panasonic 50" th50 turned off and wiil not turn on again.

Posted on Sep 08, 2010

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