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Master thread for Panasonic plasma not turning on - Page 50

post #1471 of 1980
Quote:
Originally Posted by ehsenshaikh View Post

I have a 42 inch plasma TV which I purchased in 2008. Two weeks ago it suddenly shut down and its power LED blinks 6 times and then completely turns off. If I start to switch it again it does the same thing.
I sent it in to Panasonic and they tested it for 2 days and said it worked fine. They returned it and it had been working fine till today when I tried connecting it to my Laptop through HDMI. Did the same six flashes, I unplugged it for around 15 min. Plugged it back in and its working fine again.
What could be causing this malfunction. If it helps, I have the TV connected to a QED Power conditioner through a MGE UPS. The HDMI cables that I use are QED gold plated edition.
Thank You.
My setup is as follows:
PS3, Denon DVD player, WDTV 1st generation (connected to a 1TB HDD) all three going into a Oppo HDMI switcher which relays the signal through another HDMI cable to my Denon AVR and from there to my Plasma (as my plasma only has one HDMI port). So, whenever I use any of these 3 devices sound is relayed through my amplifier to my KEF towers.
In addition I have a Coship digital set top box connected to my Plasma through normal av cables.
For the record, around 2 months ago my WDTV started playing up. It would randomly restart itself during a movie playing. I googled and found that I'll have to replace the unit. Just thought I'd mention it if someone sees a connection between the two or not.
Thank you.

Regardless of what the blink code is meant to mean, your purchase date suggests that you have a PZ/PX series model, and I very, very strongly suspect that your symptoms are being caused by the usual failing caps on the MC201/301 modules on the power supply board, as I have described in post #1447 and a number of earlier posts. Regardless of whether or not these two little capacitors are the only problem, they NEED to be replaced before any valid diagnosis can be made of other/remaining faults.
post #1472 of 1980
Quote:
Originally Posted by ehsenshaikh View Post

I have a 42 inch plasma TV which I purchased in 2008. Two weeks ago it suddenly shut down and its power LED blinks 6 times and then completely turns off. If I start to switch it again it does the same thing.
I sent it in to Panasonic and they tested it for 2 days and said it worked fine. They returned it and it had been working fine till today when I tried connecting it to my Laptop through HDMI. Did the same six flashes, I unplugged it for around 15 min. Plugged it back in and its working fine again.
What could be causing this malfunction. If it helps, I have the TV connected to a QED Power conditioner through a MGE UPS. The HDMI cables that I use are QED gold plated edition.
Thank You.
My setup is as follows:
PS3, Denon DVD player, WDTV 1st generation (connected to a 1TB HDD) all three going into a Oppo HDMI switcher which relays the signal through another HDMI cable to my Denon AVR and from there to my Plasma (as my plasma only has one HDMI port). So, whenever I use any of these 3 devices sound is relayed through my amplifier to my KEF towers.
In addition I have a Coship digital set top box connected to my Plasma through normal av cables.
For the record, around 2 months ago my WDTV started playing up. It would randomly restart itself during a movie playing. I googled and found that I'll have to replace the unit. Just thought I'd mention it if someone sees a connection between the two or not.
Thank you.

After the 6 blinks, keep watching it.. It should blink 7 times. If that's the case contact Panasonic. They should cover the primary board, and replace it at no cost.

This is specific to firmware related issues.
post #1473 of 1980
I have a TC-42PC2. One day, Started giving me the 7 blinking lights of death.

Took it apart and followed the 13th Generation guide for trouble shooting 7 blinking lights. One step was to disconnect the SC/SU/SD board and see if it changed to 6 blinking lights.

Since I only had an SN board, I disconnected that and the lights did indeed change to 6 Blinking lights of death.

Ordered a new part from shopjimmy.com, replaced the old SN Board with the new one. Problem Solved. Documented it for youtube (search "7 blinking lights of death fix" and you'll see it's the only one by MoeSizzlac01) I hope this helps someone else out there. Hate getting burned. Thanks everyone else on these boards for your helpful insight. You gave me a good starting point for solving the problem.
post #1474 of 1980
I replaced the P-Board on the 42PZ80UA and it is working again. What is the proper way to measure VSUS? The test point TPVSUS is shown on the SS Board in the attached photo. Do I just clip one DC multimeter lead to that transistor lead and the other to the chassis?
450
post #1475 of 1980
Yes, you would measure from the TPVSUS with one meter lead & chassis ground with the other lead.

However, if the new power supply board has not had normal size, NON-surface-mount 1uf caps installed on the MC201 & MC301 modules, you WILL have trouble again in the future.
post #1476 of 1980
Quote:
Originally Posted by stephensank View Post

Yes, you would measure from the TPVSUS with one meter lead & chassis ground with the other lead.
However, if the new power supply board has not had normal size, NON-surface-mount 1uf caps installed on the MC201 & MC301 modules, you WILL have trouble again in the future.
Do you think the MC201/301 issue fix still applies to the later (Nov 2008) model PZ80UA? The P-Board on this model is N0AE6KM00001, which seems like a redesign of the 80U board. I never had any blink codes - it just blue a fuse from a rectifier circuit short.
post #1477 of 1980
Quote:
Originally Posted by samw View Post

Panasonic TH42PZ77 bought on Jan 2, 2008. Died May 26, 2012. 10 blinks.

Came across this video while viewing moesizzlac's YouTube video. It suggests that a tranformer's thermal fuse might be defective in your model, causing the 10 blinks.

post #1478 of 1980
Quote:
Originally Posted by jdbimmer View Post

Do you think the MC201/301 issue fix still applies to the later (Nov 2008) model PZ80UA? The P-Board on this model is N0AE6KM00001, which seems like a redesign of the 80U board. I never had any blink codes - it just blue a fuse from a rectifier circuit short.

Well, I would not count on it. You should refer to the photos I posted in msg#1447. If your new board still has the MC modules as shown & you don't see some sort of larger cap soldered on, but rather just tiny chip caps on the modules, then it's still the same old inevitable issue.
post #1479 of 1980
Quote:
Originally Posted by stephensank View Post

Well, I would not count on it. You should refer to the photos I posted in msg#1447. If your new board still has the MC modules as shown & you don't see some sort of larger cap soldered on, but rather just tiny chip caps on the modules, then it's still the same old inevitable issue.
There are similar modules on the newer board but they look like a complete redesign. Anyway, I checked VSUS and it was spot on as has been the general experience, screwed it all back together and it works perfectly!
post #1480 of 1980
My Panasonic TH-46PZ85B has been giving me the 7 blinking lights on startup and after reading this post i have been able to trace the problem to the SU board, to which i have managed to source a replacement

Is replacing the board simply a case of reinstalling it, or is there any set up procedure that need to be done prior to/after installation?

I have also seen a few posts on here regarding the small caps on the power supply board, should I be replace these while I have the back off the unit?

Thanks for your Help
post #1481 of 1980
Quote:
Originally Posted by ScotInOz View Post

My Panasonic TH-46PZ85B has been giving me the 7 blinking lights on startup and after reading this post i have been able to trace the problem to the SU board, to which i have managed to source a replacement
Is replacing the board simply a case of reinstalling it, or is there any set up procedure that need to be done prior to/after installation?
I have also seen a few posts on here regarding the small caps on the power supply board, should I be replace these while I have the back off the unit?
Thanks for your Help

My situation was a little different on the 7 blinking lights just because of the model number and back components. youtube "7 blinking lights of death" by Moesizzlac01 and that is my solution. As far as I know, treat your TV like a computer. Make sure you are grounded and use Latex Gloves to keep you from Discharging a shock on any board. Otherwise it is a matter of unplugging the old board and plugging the new one in.

As for the power, I can't help you there. Maybe someone else can shed some light for you.

Good luck and post your results (preferably on youtube and here)
post #1482 of 1980
Quote:
Originally Posted by ScotInOz View Post

My Panasonic TH-46PZ85B has been giving me the 7 blinking lights on startup and after reading this post i have been able to trace the problem to the SU board, to which i have managed to source a replacement
Is replacing the board simply a case of reinstalling it, or is there any set up procedure that need to be done prior to/after installation?
I have also seen a few posts on here regarding the small caps on the power supply board, should I be replace these while I have the back off the unit?
Thanks for your Help

Odds are EXTREMELY high that the SU board problem was caused in the first place by those two little caps on the MC201/301 modules causing instability in the supply voltages. So, YES, you should POSITIVELY replace those caps while you have it apart. See my post #1447 for photos of proper polyester film cap installations, and my other posts for instructions.

I feel quite sure that at least the PZ/PX series sets would have almost no failures if those caps had been proper film caps in the first place.
post #1483 of 1980
Quote:
Originally Posted by stephensank View Post

I feel quite sure that at least the PZ/PX series sets would have almost no failures if those caps had been proper film caps in the first place.

stephensank,

Are you sure that the PX series is involved? This eBay seller also mentions the PX series in power board repair.

I have two of the TH-42PX80U, and they appear not to have the MCx01 boards or the TEA1611 IC chips.
post #1484 of 1980
Quote:
Originally Posted by tomwil View Post

stephensank,
Are you sure that the PX series is involved? This eBay seller also mentions the PX series in power board repair.
I have two of the TH-42PX80U, and they appear not to have the MCx01 boards or the TEA1611 IC chips.

Well, actually it seems some PX may and some PX may not have the modules with the TEA1611 chip & bad cap. Didn't go hunting for a service manual for PX, but it appears that those which use the ETX2MM702 series power board have a different arrangement of modules, so may not use TEA1611 types, but any that use the 704 series positively do have them.
post #1485 of 1980
Thanks for the advice

I have ordered some 1uF metallized polyester film caps to replace the suspect ones

Do you have to remove the MX201/301 boards from the main P board to replace the suspect ones, I had a look and thought I could get away with doing it in place after removing the board from the tv
post #1486 of 1980
Quote:
Originally Posted by ScotInOz View Post

Thanks for the advice
I have ordered some 1uF metallized polyester film caps to replace the suspect ones
Do you have to remove the MX201/301 boards from the main P board to replace the suspect ones, I had a look and thought I could get away with doing it in place after removing the board from the tv

I have been doing it with the modules still in place.
post #1487 of 1980
Hi I recently received a Panasonic plasma from a friend, because he had isssues with it not turning on. He told me that it was an intermittent problem at first, then eventually wouldn't turn on at all.

The model is th-c46fd18 which I haven't seen in this thread. When I received it I plug it in and it started blinking 10 times. At first I though it might be the sub power supply board, which would be a cheap fix ($30 part), but then I stared reading more about the caps/resistors.

Does this model have the MX boards like most spoken about in this thread? Any help would be greatly apprieciated, thanks
post #1488 of 1980
Quote:
Originally Posted by DLab85 View Post

Hi I recently received a Panasonic plasma from a friend, because he had isssues with it not turning on. He told me that it was an intermittent problem at first, then eventually wouldn't turn on at all.
The model is th-c46fd18 which I haven't seen in this thread. When I received it I plug it in and it started blinking 10 times. At first I though it might be the sub power supply board, which would be a cheap fix ($30 part), but then I stared reading more about the caps/resistors.
Does this model have the MX boards like most spoken about in this thread? Any help would be greatly apprieciated, thanks

According to shopjmmy, the model uses the same series power board as the PZ series, so you can pretty much count on cap replacement on the MC301/201, as shown in my post #1447 & others, fixing your set right up.
post #1489 of 1980
Quote:
Originally Posted by stephensank View Post

According to shopjmmy, the model uses the same series power board as the PZ series, so you can pretty much count on cap replacement on the MC301/201, as shown in my post #1447 & others, fixing your set right up.
Thanks. Last night I actually opened up the tv. To my surprise I did find the MC301/201 boards. The board was labeled "etx2mm704mg." Tonight I hope to find some film capacitors locally. I'll also need a better soldiering iron. Would it be a good idea to pick up some resistors too, or should I just try the caps first? Thanks again
post #1490 of 1980
Quote:
Originally Posted by DLab85 View Post

Thanks. Last night I actually opened up the tv. To my surprise I did find the MC301/201 boards. The board was labeled "etx2mm704mg." Tonight I hope to find some film capacitors locally. I'll also need a better soldiering iron. Would it be a good idea to pick up some resistors too, or should I just try the caps first? Thanks again

The "resistor trick" is purely diagnostic, compensating for current leakage in the chip caps, and should not be made permanent. So, you just need two 1uf film caps of 50V or higher rating.
post #1491 of 1980
Quote:
Originally Posted by stephensank View Post

The "resistor trick" is purely diagnostic, compensating for current leakage in the chip caps, and should not be made permanent. So, you just need two 1uf film caps of 50V or higher rating.

I couldn't find a film cap locally so I ended up with a 1.0uf tantalum 35w cap from radioshack for the time being, because I was excited to try it. Last night I just did the mc301 board and to my surprise it worked!!! Very happy about it. Thanks so much for your help!
My next step is to order the proper film caps from ebay and do the repair on both the mc301 and mc201 boards. I did the repair without taking out the board, but it would be much easier to do with it removed.
So anyone with a th-c46fd18 model tv with 10 blinking lights, I can confirm that replacing the cap on the mc301 board fixed the problem. Thanks again
post #1492 of 1980
Is there a generally available photo layout of the boards for the TH-46PZ85U? And if so where can it be obtained?
It's when a board is referred to by name, part number or board designation (A, PS) it's extremely consusing. Thanks!
post #1493 of 1980
Quote:
Originally Posted by vancurren View Post

Is there a generally available photo layout of the boards for the TH-46PZ85U? And if so where can it be obtained?
It's when a board is referred to by name, part number or board designation (A, PS) it's extremely consusing. Thanks!

The service manual should contain an outline of the boards and their position.
post #1494 of 1980
post #1495 of 1980
If someone is looking for a PZ77U SUS board, I have an extra I'm willing to sell for pretty cheap (I bought one, then panasonic replaced mine for free)..

On another note.. I bought an ST50 and after 3 weeks it stopped working with a single blink. Panasonic split the service manual from the troubleshooting guide.. anyone have access to it? I got the TV replaced, but it's killing me to know what caused it, primarily because I exchanged for a new ST50.
post #1496 of 1980
Quote:
Originally Posted by DavidOH View Post


This was done the end of November and the 50pz80u is still working. Yes it is tedious but can be done. It helps if you've done some soldering in the past.

Attachment 247084
525x525px-LL-9be2ef34_vbattach247084.jpeg

Big thanks to David, I orginally found his post on BadCaps and followed it to the wealth of information here. Also a big thanks to stephen for the insight he's been providing and posting of additional pictures.

My panasonic plasma (TH-50PZ85U) suffered from the 10 blink at first intermittently, then stop working all together with 2 blinks. I followed the instructions here and soldered the 2 new caps on the MC201 & MC301 on boards. To my surprise everything worked!

I just took the main board out but kept the daughter boards attached when I did the soldering. I ended up getting the 1uf 50v DC film caps from Digikey.

Thanks again!
post #1497 of 1980
Hi,

I have a TCP54G25 plasma and today it will not turn on. The red LED blinks consistently every 3 seconds or so.
The only way to stop it is by pulling the pwr cord.

Does anyone have any ideas on this? The TV is out of warranty.
post #1498 of 1980
I have been reading this for a few hours but i still cant find out what to do ATM. I have a TC-P50-G20 plug in and get the 4 blinks, but if i hold down the power button the 4 blinks (P-BOARD) turn into 10 (A-BOARD). So now i don't know what to do, just order both board and say F it or is there a GEN 13 manual I can look at cause all I can find is GEN12. Some direction would help. (PS i am into this TV for $150 bucks.
post #1499 of 1980
Hi,

I got exactly the same symptoms in my TX-P42U10E.
As soon as the tv shuts down I realise that the 5V sub+ to A-board is missing. This voltage is supplied by the power fet VKHAT1130R controlled by the power micom VILC87F2G081. This last one is managing the SOS signals and the power relays. These keep clicking apparently randomly for a few moments and then nothing, the tv goes to a completely shut down state!

I was hopping you sort out the problem and maybe could give me a tipo on how to solve this.

Thanks anyway

angpaz
post #1500 of 1980
Hello everyone,

I have a Panasonic TH-42PX75U plasma (May 2007 manufacture date) that once again will not turn on whatsoever, no blinking LEDs at all. I say once again, because I fixed this problem back in January and the TV ran great for a week or so, now it won't power on and both fuses are blown on the Power Board. I used a fix it kit I got on eBay (Item# 130701809472), which included a new Q406 transistor and 2 new fuses. I got the TV to work, but I had a little problem when I installed the Q406 transistor onto the board, the 3 prongs were a little too wide for the eyelets on the board and I tried to bore out the eyelets with a 1/16" drill bit, but to my dismay, 2 of the 3 eyelets for the transistor broke apart, thus leaving the bare motherboard. However, I was able to solder the new transistor to the board. Does anyone think this may have caused the board to fail? Due to the 2 missing eyelets? Are they a critical part of the circuitry?

I should mention the TV has been sitting in my front room, unused, since mid January (since it was working). This was due to my Dad purchasing another plasma and we really had no need for the affected Panasonic plasma until now. I turned it on a couple days ago (with a surge protector) and it ran fine for a good 20 minutes until all of a sudden it blacked out. I tried turning it on via the power button on the front left corner and nothing! Just dead. Having previously experienced this, I knew the fuses were blown and I was back at square one.

So I was hoping someone here has gone through this and found that replacing the entire power board (TXN/P1HNTUS, aka TNPA4221AB) will solve my problem?

I found the board for $100 shipped through tristatemodule.com with a 6 month warranty, but I'm just hesitant to buy this and have it be another component, such as the A board (which I've heard could be a problem). Spending $100 and not fixing the problem would not make me happy.

If there's anyone who could help me out with this, I'd really appreciate it. I don't know what to do at this point, I don't want to throw the plasma away, since it only has this 1 problem.

I'm going to go and read as much through this thread as I can, try and gauge an understanding as to why this happens.

I have a 2005 and 2006 Panasonic plasma set that are still running like champs, no problems at all (knock on wood). It seems these 2007 models have a very high failure rate from what I've researched.

Any help would be greatly appreciated, I currently have the plasma sitting on a dresser with the back cover off, and not knowing if my power board is faulty or not is driving me nuts! I just want to fix this thing and keep it fixed.

Thanks everyone
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