Master thread for Panasonic plasma not turning on - Page 55

TH-50PZ85U, powers on OK, plasma "lights", but no menus (OSD), no picture, no LED flash code. Service manual said to replace the D board, since both the SS and SC board LEDs look solid green. New D board from Panasonic, no difference. Probed voltage outputs on P(main) with DMM, everything looked good? So what's next, the A ($330) or ... ?

Fortunately, it's a short drive for me to the Panasonic warehouse (kent, WA. Admins there weren't sure what return policy is, but seem to think anything returned within 30 days has restocking fee waived.

I have a TC-P65S2 and it quit turning on and now the power light flashes 7 times. Does anyone know which board that needs replaced? Power Board?

Have you managed to fix this problem yet? If so, can you please please let me know what was the problem? If anybody else has experienced this before and solved it please feel free to help. Thanks

I seem to have the same problem, it started with the 2 blinks. If I reset the tv by pressing the power for ten seconds, it switches to 10 blinks. When i unplug the tv, it still has ten blinks so i press the power to clear all power. When I plug it back in again, I get no lights. But once I hit power, it starts the 2 blinks code again and it will stay 2 blinks till I reset it by pressing the power for ten seconds. Then it switches to 10 blinks. I also have the TH-C50FD18.

If anyone can help, it would be much appreciated.

Going by previous posts on this thread, your symptoms appear the A-board is defective.




Beginning with this post should give you a start in solving the 2 and 10 blink problems with your model TV.

So the tech came today and replaced the SC board. I merely glanced at the TV once he was finished (my fault) and it looked fine. After he left I noticed there is some purple pixelation at the bottom of the screen. It almost looks like snow. Also, there are faint horizontal lines appearing at times.

I am going to call him tomorrow but just curious if anyone knows what might be causing it?

For those having the blinking light of death issue with an NVIDIA card. I have a solution. This has bugged me for a while but I just dealt with it by unplugging the hdmi when I turn the tv on.

Back story
I set up TightVNC to mess with steam on my pc plugged into the tv from my laptop. I noticed that whenever I turned the tv off VNC would get knocked into 640x480. This is why the plasma's protective circuitry kicks in. The video card reports an invalid resolution when you first turn it on and the protective circuitry kicks in.

The fix if you are running windows:

1. Install TightVNC
2. Turn OFF the tv so your card defaults back to VGA 640x480
3. Log into your VNC server remotely
4. Bring up the nvidia control panel
5. Under "change resolution" hit the "customize" button.
6. Check "Enable resolutions not exposed by the display" if not already.
7. Click "Create custom resolution"
8. Input the numbers for a valid resolution for your display*, I chose 720p ( horizontal 1280, vertical 720, scan-type progressive )
* note: this will NOT affect your available resolutions with the display ON, this is the resolution that will be used when the display is OFF
9. Hit "OK", I could not see the ok button so I had to collapse the "timing" section using the arrow.
10. Hit "OK" on the "change resolution" page, I could not see this, had to press tab to get to it and hit enter.
11. Select your new custom resolution, accept the warning.
12. Turn on your TV !!!

Excuse me if this has been covered. There were 55 pages to the thread and I gave up reading it. :P

We bought a 42" Panasonic Viera Plasma (model number TH-42P Z71U) four years ago. We've experienced the "red blinking light of death" FIVE TIMES since then! We replaced the power supply four times (it was under warranty the first three times--a complaint to Panasonic resulted a free repair the 4th time!). Yesterday, we attempted to turn it on and the blinking light reappeared, blinking 10 times, which indicates we may have a problem now with the video board. Unreal. My husband called Panasonic and explained the history to the customer service rep who gave us the name of a repair shop 70 miles away and then denied that there is a problem with these plasmas. He would not connect my husband to a supervisor. My husband asked if he was aware of any class action suits, the rep responded he had NO idea what my husband was talking about. We have decided to replace this TV with another brand and buy the extended warranty. In the meanwhile, we will put this one in the basement just in case there is any admission and restitution on Panasonic's part. I will NEVER purchase another Panasonic product and will make sure I tell everyone I know about my plasma and their poor customer service. In the meanwhile, Consumer Reports STILL lists the Viera as a top TV to purchase. I'll be emailing them next...

Sorry if I did not find a better place to post this, but reading the multiple pages of this thread leads me to believe someone here may be able to help us. I picked up a TH50pZ80U for a song with the seven blinking light issue. After using the manuals we finally traced it to replacing the SD & SU boards and we had some success. But when we did get it back up and running we have a black vertical bar in line with the innermost buffer on the C1 board.

I ordered a board from EBay and when installed we had two black vertical bars. I contacted the seller and returned it. I then bought one from shopjimmy which I assume has been tested. We still have the same bar as originally. Frustrated, but not willing to give up... I unplugged that particular buffer cable. The screen then shows a white band starting at the bottom and turning to a blueish purple as it rises towards the middle of the screen, than nothing at the top. I did unplug another buffer on C1 and got the same result. This leads us to believe the display is fine. I did find another thread on here where a guy posted a photo of the same exact thing, but there was never a resolution posted.

Any help is appreciated!! We also replaced the SC and D boards during our trek in case that comes to mind.. Roger

Just wanted to drop a quick note saying that my "red haze" was in fact "solarization" or "red snow". My repair shop tested it, and determined it was a bad D board. They replaced it and had it back to me in a little over a week (the Thanksgiving holiday) hurt the turnaround time.

Thanks again for all your help.

Thought I'd see if anyone had a quick thought on my seven blinking lights problem. I'm no techie, just a broke dude trying to fix a TV.

Model is TH-C50HD18. Got the 7 blinking lights and ordered new SU/SD/SC boards from shopjimmy.com in the hopes of doing a cheap repair. No luck, still get the 7 blinking lights.

The only time I can make the set turn on without turning off and going to 7 blinks is when the SC20 connector is removed.

Following flow charts, It seems like it could be any board, which is no help. If it's the P board, I can't afford a new one. I've already replaced the usual 3 culprits.
Based on some of the posts in this thread, it looks like I may have a shorted transistor on the SC board, which I definitely don't have the expertise to fix.

Any thoughts????

I am not sure if you have the same diagnostics manual for your TV as the Panasonic one that we found for our TH50pz80u but we followed the diagnostic procedure and it cured ours. I did go the extra step of checking the outgoing voltages on the power supply. If you have a good meter you can check them and determine if the power supply is bad or not. Make sure and check closely though. Ours had to have everything hooked up to the SC, and then you disconnected the SU and SD boards independently ( I believe?) and then there had to be a floating ground connected per the manual. Then we got the SC board to come to life so we could check voltages, otherwise it shuts down because there is a problem. There were so many different manuals available, it took some searching to find the EXACT one for our TV.

Of course once we got past that point we moved onto another problem (above) which we have gotten no help on yet. Good luck with yours!

PS: I am not sure these suppliers really check these boards. So I hope the parts you got were good! I contacted a well known supplier and asked them what they would give us for our TV and boards we had bought online and, if I delivered it, they would give us $20. No mention was made to checking them and making a valid offer based upon the condition. I think they disassemble and ship out and if they do get a return, no problem, we have a high enough margin to refund their money?

According to this document, page 23, the vertical bar is from a defective D-board, although the C-board appears listed also. Be sure the ribbon cables are connected properly from the plasma panel to the C-board, and from the C-board to the D-board.

There is the chance that the plasma panel could also be defective, but that usually results in lines, not bars. However, if that embedded IC chip in the ribbon cable goes bad, bars can appear, as described here, and the panel itself will have to be replaced.



Not sure what flowchart you followed, but the following flowchart should help:


Edited by tomwil - 12/13/12 at 1:33pm

Viera TC P50S30
50" plasma

Build date 7/11
Purchsed 9/11
Failed 12/13/12
Sold at HHGregg, Nashville TN

Got the 7 blinking lights this morning. Unplugged for an hour, reconnected with no change. Moved HDMI cable around - no change.

Have called Panasonic, but they need me in front of the set, plugged in, to run their diagnostics. Maybe tomorrow evening - I gotta work for a living.

David

Hey guys, do the 50" and 55" variants share the same A-board? I have a 55GT30 that was repaired with an A-board swap. It's reading the PDP EPP value of a pre-patch 50GT30 (52.0b).

Apparently, according to the service manuals of the TC-P50GT30 and TC-P55GT30, they have a different Panasonic part number for the A-board.

Thanks tomwil

We have already replaced the D board hoping that is the case, but no luck.

I have visually inspected the cable from the C1 board going into the PDP. There is no inbedded chip in the cable. It is very thin and flat, and just connects the board to the display. I hate to order another C1 Board just to get the same result. If you disconnect two different C1 to PDP cables and get the same result, that leads me to believe it is not the PDP, right?

Follow up to tomwil,

I went down again and with a magnifying glass looked at the cable one more time. There is what can best be described as a think spot in the cable, very thin though. I am betting this is the imbedded chip? You can see the circuit tracks from the connector all going into this area, and coming out again. Like a restriction in the flow.

Damn, looks like we have a lot of good parts for a TH50-pz80u for sale. Anyone interested?

That leads me back to replacing the SC Board, which I already did. Possible I got a bad one from shopjimmy.com, but my gut tells me the problem is elsewhere than SU/SD/SC and I just don't know enough to isolate it.

Thanks Tom. Is there any other possible explanation for it to be reading the 50" EPP value aside from them having put the wrong board in? What exactly does the A-board do? I noticed after replacing it, the SM suggests checking the VSUS value, does it handle the various voltages to the panel? If so, I'm assuming that would have to be different between the 50" and 55" models.

Hello!

I purchased my 55" VT50 about a week ago at Best Buy and have it connected to the cable box with an HDMI.

Twice I have encountered the following:

While watching cable TV, seemingly at random, the screen goes black and a very high pitch sound emerges from the Panasonic (not sure if it's speakers but seems likely). The sound is very loud and lasts for about 10 seconds. During this, none of the TV remote control functions are operational. When the sound goes away, a message window comes on the screen which reads something like "Error Resolved....". This message disappears within a few seconds and TV shuts down. At this point, the TV can be turned on again and continues functioning with no issues at all.

This happened twice in the span of the week, randomly. I called Panasonic tech support and they advised me to re-set the TV, which I did, but I have a feeling this may be some sort of an issue with this particular unit. Should I return it to Best Buy now while my return window is open and get another one? I did through out the box already - not sure if this will be an issue with the return.

Any advice is much appreciated!

Do you even have to ask? It's defective. Return it immediately for a new one. Failure rates are very low (around 2%), so the odds are highly in your favor if you exchange it for another one. (This is why I only buy such big purchases locally - exchanging it with an internet store is too much of a hassle.)

Hey,
I've read thru and searched on this thread, so here goes my story for Panasonic Plasma:
Bought a P54G25 in March 2011 from Amazon. Did not purchase any extension on warranty. All was well until last week....almost 21 months after purchase.
No power up. Because we live in a mountain area that has fluctuating power, my first thought was perhaps something to do with that. But I have it on a surge protector.
I checked the outlet, then all cords and cables. No problem there.
Then I got online to search for possible ideas and forums
Read about HDMI input here and tried changing the cable to the front, but no effect.
I then unplugged all cords and cables for an hour or so. When I reconnected the power only, and pressed the power button once, nothing happened. But the red light on the front blinked 4 times and then paused and repeated. When I held the power button in for some length of time and released it, the red light blinked for 10 times in sequence with a pause. But when I unplugged the power cord and tried again, it would do the 4 blinks. So not sure which board that's referring to as bad??? Any ideas.
My story is no different from many others.
I paid $1300 for the TV in Mar 2011. In October 2011 I bought a second Panasonic Plasma for a different room. It's a P50S30 for $800 and haven't had a problem with it ...yet.
"But it's only 14 months old."
TV repairmen are not real close to my corner of northwest GA / northeast AL...so is it even worth it to attempt to fix?

Hi

My 42 inch is also doing the 7 light blinky thing

Model 42px8a
Manufactured Jun 2008


i am finding so many people with the same problem on so many forums...seems to be happening everywhere!

Really regretting buying my Panasonic now!

I have a TC-P42S1 that recently gave me the 10 blinking lights. I checked the voltage coming out of the P board and they all agree with the Panasonic manual. I went ahead and replaced the A-board thinking that might be the problem but I still got the 10 blinking lights. I double checked the SC board at the connector where the power comes in from the P board and I found a short. I have an SC board ordered but I was wondering if there is anything I need to do before putting in the new SC board or any adjustments that need to be performed with the new SC board?

Thanks for the help.

Looking for some troubleshooting help on my 50" Panasonic Plasma.

Model Number: TC-P50G25
Manufactured Date: September 2010
Connected Devices: PS3, Apple TV, AT&T Uverse, Panasonic Sound Bar

Problem:
We've been experiencing sporadic power problems for about a month. Sometimes the unit wouldn't power on after being shut down. Sometimes the unit would power back on after several tries, but not have audio. Sometimes the unit would power back on only after killing the power for 5-10 minutes. etc. The power and audio issue was too random to pin-point anything in particular. I'm a bit suspicious of the HDMI 1 (ARC) port. This was connected to the Panasonic Sound Bar which appeared to quit talking to the TV all together.

Part of what's baffling me is the blink code. It blinks with about a 2-3 second gap, but doesn't stop (20+ blinks). I can't match the code to any of the codes I've found listed online.

What I've tried(Multiple Times):

1. Disconnecting All Devices (Problem Still Exists)
2. Disconnecting Power for 5-10 Minutes (Problem Still Exists)
3. Self Check + Factory Reset (Problem Still Exists)

The Self Check indicates that everything is OK, however at the very bottom of the self check, it indicates an SOS: 01. I can't seem to find any specific fixes for SOS: 01 online.

I'm mildly skilled with electronics. I was able to remove and solder in a new capacitor on my 40" Samsung (Which I'm running untill I can get my Panasonic working properly). I'd rather figure out how to repair on my own vs. a costly repair from a repair company. I'm not opposed to buying a few tools (e.g. voltage tester) if need be to further troubleshoot.

Can anyone point me in the right direction?

Hey I hope your still out there I am having problems with a 50 inch panasonic plasma tv the red light flashes 10 times. I found a post on here (#1292 by dtvjho with the same problem and it referred to your post with the picture My question is will this produce from radio shack replace it. please write back thank you for your help 1000µF 50V 20% Axial-Lead Electrolytic Capacitor

hey sir I have a panasonic 50 inch TC-p50s2 with the same that you have had 10 red flashed I read you and the post you referred to #1111 and just wanted to know is this the replacement for that chip cap that is bad 1000µF 50V 20% Axial-Lead Electrolytic Capacitor

Good evening. I have experienced the 10 blinking lights on my tc-p50g25. I have no idea if I should fix this or toss it. Not very old. I am very frustrated because I love the tv. Any ideas on this model of how to fix this? New to the forum, and not electronic savvy. Thanks for any input.

1000uF is probably too big. I used a pair of 1uF 50V caps to fix my 50-inch TH-50PZ80U. RadioShack is expensive. If you can wait for UPS delivery, order parts from Digi-Key, Mouser, Jameco or Newark.

I've seen different posts about people with flashing red lights, but my problem is I have ZERO flashing lights. I have a TCP42X1 and if I plug it in and hit the power button, the red power light comes on, stays on for 10 seconds or so, and then shuts off. I can hear a loud click on the power board, but aside from that, no dice. I have the back off and don't get the light on the power board or anything. Hard to troubleshoot this when all of the posts are for people who get flashing lights and I don't get any flashing lights at all. I don't see anything burned out, no visibily blown caps, nothing. Just doesn't work. Suggestions?