Question about Panasonic PT-40LC12 40 in. LCD Television

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PT-40LC12 turn set on blinking green light comes on for few minutes then red light comes on and shuts off ?

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Power Supply!!! to all with this kind of problem, if you have a brand name get the supply rebuilt by tri state modules or pts corp. easy to remove and install yourself.

Posted on Jul 23, 2009

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Posted on Jan 02, 2017

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I have a Panasonic PT-50DL54 50" rear projection tv. My tv screen won't come on but the fans will. The power led light flashes green like normal but than starts to flash fast for about a minute than the...


Time to get a new TV. I have similar problem. In my case, the set turns off, LED blinking green for about a minute or 2, then the set will turn on by itself. Something the LED started to blink yellow after blinking green and then shuts off. I can turn it back on. This happens 3 or 4 times in an hour. After that, the TV stays on for as many hours as I want until I shut it off.
And then the problem repeats everytime I turn it on from a cold start.
I have my eyes on the 50 inch Plasma from Panasonic. Bestbuy has one for 999.99.

Jun 14, 2010 | Panasonic PT-50DL54 50" Rear Projection...

2 Answers

I try to turn on the tv and the green light just blinks, nothing happens. After a few minutes it shuts off and the red light blinks two times and pauses. The red light blinks until I disconect from the...


If the front power light is blinking three times then your TV has a problem with the convergence. You can get the correct replacement parts and full step by step photo instructions from www.TvRepairKits.com

Dec 06, 2009 | Panasonic PT-56LCZ70 56" HDTV

3 Answers

The Power Light is Red


yeah, should stay red when unit is turned off, indicating there's power but it's doing nothing.

Per user manual:
Solid red - power off (standby mode)
blinking red - power off (now cooling)
blinking green - power on (preparing to light lamp)
solid green - power on

Mar 08, 2009 | Panasonic PT-40LC12 40" Rear Projection...

3 Answers

PT 40LC12 Panasonic


Problem is the bulb.
I had this exact same problem.  Even though the bulb appears to be good, it is drawing too much current to run properly, and the ballast is shutting it down.

Aug 03, 2008 | Panasonic PT-40LC12 40" Rear Projection...

1 Answer

Power button blinking green


disconnect the power cord overnight try it if ok change power cord cheers

Dec 29, 2007 | Panasonic PT-40LC12 40" Rear Projection...

1 Answer

Blinking Green Light to Blinking Red


The lamp could still be the issue even though it looks ok. The other possibilities are the lamp ballast (power supply for the lamp) and/or the thermal fuse. In either case I would have a technician look at it so you don't replace parts you don't need.

May 01, 2007 | Panasonic PT-40LC12 40 in. LCD Television

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