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Panasonic Blinking Power light of Death

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Old 08-19-2010, 07:03 AM   #136
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It sounds like you had a defective set from the beginning. Didn't you think it odd that the screen would go black like that? That is not normal. Too bad you didn't look into that problem as it could be related to the issue now. I think it was an early warning sign that something wasn't right, and it is too bad you didn't pursue this issue while it was under warranty.
I was going to ask, when it comes to panasonic plasma tvs, what are some subtle things I might see that might indicate another problem?

For example when i turn on the tv the screen glows then goes dim, then the input information comes up I noticed the screen brightens and dims slightly while the TV is booting and my settings are loading. I 'd say the cycle takes about 5 seconds before the tv is running and ready for use. Especially with an HDMI input. Is this normal operation? P.s. when i say brighten and dim for the scren it's not a constant flicker, it's like the tv comes on at full brightness then adjusts to the settings for the input.
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Old 08-19-2010, 01:05 PM   #137
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Hello, I am wondering if anyone can offer me a bit of help on an issue I have come across. I have a Panasonic TC-32LX70 and it will not power up. Instead I get 13 flashes. I've searched many of the threads and see where this is addressed but it is for other models. I'm not sure if the 13 flashes is for a dg board or something entirely different. Any help would be appreciated.
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Old 08-19-2010, 01:08 PM   #138
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I was going to ask, when it comes to panasonic plasma tvs, what are some subtle things I might see that might indicate another problem?

For example when i turn on the tv the screen glows then goes dim, then the input information comes up I noticed the screen brightens and dims slightly while the TV is booting and my settings are loading. I 'd say the cycle takes about 5 seconds before the tv is running and ready for use. Especially with an HDMI input. Is this normal operation? P.s. when i say brighten and dim for the scren it's not a constant flicker, it's like the tv comes on at full brightness then adjusts to the settings for the input.
This is normal to have it brighter at first. It is the initial electrical charge of the plasma cells to fire them up, and then they adjust. No worries with that.

The blank screen when changing HDMI inputs is also normal as part of the HDMI spec is that they are required to use copy protection on the connection and a handshake process is required as part of that. Kind of like the old dial up modems that went through a handshake process to confirm the fastest connection speed that both ends could handle.
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Old 08-19-2010, 01:09 PM   #139
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Hello, I am wondering if anyone can offer me a bit of help on an issue I have come across. I have a Panasonic TC-32LX70 and it will not power up. Instead I get 13 flashes. I've searched many of the threads and see where this is addressed but it is for other models. I'm not sure if the 13 flashes is for a dg board or something entirely different. Any help would be appreciated.
Try unplugging the power to the TV for a couple of hours and see if that resets the TV.
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Old 08-19-2010, 01:12 PM   #140
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Try unplugging the power to the TV for a couple of hours and see if that resets the TV.
Thanks for the quick reply. I've done that several times. I've actually left it unplugged for a week but I'm getting the same response.
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Old 08-19-2010, 01:26 PM   #141
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Sounds like a power board issue as a guess.
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Old 08-19-2010, 03:03 PM   #142
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This is normal to have it brighter at first. It is the initial electrical charge of the plasma cells to fire them up, and then they adjust. No worries with that.

The blank screen when changing HDMI inputs is also normal as part of the HDMI spec is that they are required to use copy protection on the connection and a handshake process is required as part of that. Kind of like the old dial up modems that went through a handshake process to confirm the fastest connection speed that both ends could handle.
Thanks for the reply, I also wanted to let you know i've checked the back of the tv after it's been on for a while and it's barely warm to the touch. It's warm but not burning hot. So I'm guessing that's also a really good sign of everything working correctly.
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Old 08-19-2010, 05:22 PM   #143
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It is. After water, heat is the next biggest killer of electronics.
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Old 08-19-2010, 07:37 PM   #144
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It is. After water, heat is the next biggest killer of electronics.
Do you happen to know the POST process of panasonic tvs? if one even exists ?

for example when my stock boards blew, the TV had come on and was powering up then popped right as the display turned on e.g. when the hdmi handshake was completed and the blu-ray player output came onto screen. other people have said in this thread and others it pops instantly or it pops while the tv's been on for a while. I was just wondering if there is any connection between the time and the component blowing in the different circumstances. the other thing is has anyone proven the situation isn't just bad caps on the boards blowing, and a simple capacitor replacement would save time e.g. like the samsung power supply issues?
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Old 08-20-2010, 03:48 AM   #145
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It could be as simple as the capacitors like in the Samsung power supply problems. Someone reported that the power boards in Panasonic displays were actually made by Samsung at least in some of the Panasonic displays. I don't know if this is true or not though.

I am fairly sure there is some kind of post sequence since these HDTVs are computer controlled, but I do not know which order the boards start in. You would need to buy a service manual to find out.
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Old 08-20-2010, 06:06 AM   #146
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It could be as simple as the capacitors like in the Samsung power supply problems. Someone reported that the power boards in Panasonic displays were actually made by Samsung at least in some of the Panasonic displays. I don't know if this is true or not though.

I am fairly sure there is some kind of post sequence since these HDTVs are computer controlled, but I do not know which order the boards start in. You would need to buy a service manual to find out.
It might be ideal to investigate the situation both with the capacitors and the post. to maybe pin point where the defect occurs most (especially for people with the tv out of warranty) Capacitors are cheap to fix and usually based on the reports of the cap replacement videos and articles i've seen using haps with a slightly higher rating then the factory installed caps fixes the problem. It would be cheaper then replacing the whole board too provided that it's caps that are doing the popping.

The challenge would be whether or not the average consumer can diagnose a blown cap and do a solder job, etc.

I know for a fact that people with samsung tvs where samsung has not honored warranty or the tv is out of warranty and the people were fed up with the company did said repairs on their own and ended up with a perfectly functional set afterword. Maybe something as such can help panasonic owners with out of warranty tvs.
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Old 08-26-2010, 11:55 AM   #147
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I have a Panasonic TH-42PX60U and I got the 5 blinking lights last week. After doing a whole bunch of research and finding out that the TV is not under warranty, I ordered a new D Board from Ebay. All signs point to that as being the problem, so instead of paying for an expert to look at it, I just ordered the part.

My question is - how easy/hard are D Boards to replace? Is it something I can easily do myself? Any walkthroughs or tips would be much appreciated. Thanks!
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Old 08-26-2010, 12:20 PM   #148
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I have a Panasonic TH-42PX60U and I got the 5 blinking lights last week. After doing a whole bunch of research and finding out that the TV is not under warranty, I ordered a new D Board from Ebay. All signs point to that as being the problem, so instead of paying for an expert to look at it, I just ordered the part.

My question is - how easy/hard are D Boards to replace? Is it something I can easily do myself? Any walkthroughs or tips would be much appreciated. Thanks!
When I watched the geek squad agent repair my tv under warranty It doesn't look hard at all. Simply disconnect the ribbon cables remove the old board and put tin the new one (if this is the same board) I had replaced. Actually i had two replaced but both were easy enough. Just remember there will be a lot of screws.

I'll add a quick note that my tv is a different model. but since the problems are universal it seems, I am going to take an educated guess that the layout of the boards is somewhat similar. Which means you'll just have to undress the back of the tv and the boards are right inside. No shielding past the back. At least not with mine.
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Old 08-26-2010, 12:26 PM   #149
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Why can't display manufacturers make reliable TVs anymore? Last year I got rid of a 16 year old Toshiba CRT. Problem was with the sound, and that was the only issue I had the whole time I owned it. There seems to be a lot issues with flat panels displays (blown capacitors, power boards, etc) within the first 3 years or so of ownership.
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Old 08-26-2010, 02:10 PM   #150
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Why can't display manufacturers make reliable TVs anymore? Last year I got rid of a 16 year old Toshiba CRT. Problem was with the sound, and that was the only issue I had the whole time I owned it. There seems to be a lot issues with flat panels displays (blown capacitors, power boards, etc) within the first 3 years or so of ownership.
I agree. We are paying more for these new HDTVs but they seem less reliable than the CRTs they are replacing on average.

Of course the screens are bigger, CRT tech had well over 60+ years in refinements to make them as reliable as they became, and most were not made in China back then. I think the last reason is a big part of the problem. It seems that many times it is the power board, but often is is just a cheap 20 cent capacitor that brings down these displays now. It seems cheaper for the mfg to just spend an extra 20 cents for better capacitors than the work time/labor/CS time, etc to handle this issue later.

It seems all mfg are having this issue with capacitors and it is likely because the same source mfg is being used by many brands.
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