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Master thread for Panasonic plasma not turning on - Page 54

post #1591 of 1978
The repair guy checked voltges where the plug connects the A and P board together. The correct voltage reading is printed on the P Board. He said the voltages were correct comming from the P=board, so the A-board is sending NO SIGNAL to even light the LED red power light. Bought from ebay for $25.
post #1592 of 1978
Alright, where to begin...
Other night turned off the TV, few minutes later went to turn it back on and 10 red blinks. I tried most everything work around I've seen but the only one is to pull the power cord from the back of the unit, wait a minute and turn the set back on. It will fire up after I let it discharge.

I haven't seen another post about someone being able to pull the plug, let it discharge, and able to turn it on again. So I'm a little confused over which board it could be. I'd be willing to try it myself but I'm afraid to not knowing which board I need to replace. I've read the technical manual but lack the tools to diagnose it myself. I have a shop that will diagnose it for $50 and might go that route.

Any help from the forum would be much appreciated.

Thanks in advance.

50PZ85U
post #1593 of 1978
Quote:
Originally Posted by benjellos View Post

Alright, where to begin...
Other night turned off the TV, few minutes later went to turn it back on and 10 red blinks. I tried most everything work around I've seen but the only one is to pull the power cord from the back of the unit, wait a minute and turn the set back on. It will fire up after I let it discharge.
I haven't seen another post about someone being able to pull the plug, let it discharge, and able to turn it on again. So I'm a little confused over which board it could be. I'd be willing to try it myself but I'm afraid to not knowing which board I need to replace. I've read the technical manual but lack the tools to diagnose it myself. I have a shop that will diagnose it for $50 and might go that route.
Any help from the forum would be much appreciated.
Thanks in advance.
50PZ85U

I've had this exact issue for over a year. It used to be I could pull the plug and plug back in about 3 or so minutes; now I have to wait about 20 minutes but it never fails to turn back on.
post #1594 of 1978
Quote:
Originally Posted by StuJac View Post

Quote:
Originally Posted by benjellos View Post

Alright, where to begin...
Other night turned off the TV, few minutes later went to turn it back on and 10 red blinks. I tried most everything work around I've seen but the only one is to pull the power cord from the back of the unit, wait a minute and turn the set back on. It will fire up after I let it discharge.
I haven't seen another post about someone being able to pull the plug, let it discharge, and able to turn it on again. So I'm a little confused over which board it could be. I'd be willing to try it myself but I'm afraid to not knowing which board I need to replace. I've read the technical manual but lack the tools to diagnose it myself. I have a shop that will diagnose it for $50 and might go that route.
Any help from the forum would be much appreciated.
Thanks in advance.
50PZ85U
I've had this exact issue for over a year. It used to be I could pull the plug and plug back in about 3 or so minutes; now I have to wait about 20 minutes but it never fails to turn back on.

Read this post about the unplug-plugin routine. It will get worse and cause more damage.

Best thing to do is the capacitor fix while you still can.
post #1595 of 1978
Hi all,
I've been desperately searching around for parts and found this post.
My TH-42PZ85U isnt powering on and the power button indicator is flashing 12 times pointing to a possible problem with the 'A' board.
I am having a heck of a time finding the following part:

Tnph0721 3 A
Mv8284ar

If you guys know of any reputable places where I can find parts, that would be great!

PS: I noticed that after powering on the tv, the fans do not spin up. If the 'A' board is dead, would that affect the fans too? I believe a bad PS is 10 blinks?

BTW, I'm guessing we're all here trying to revive these tvs after spending so much years ago..lol
I did find a refurb unit in Markham for $349, but if i spend a little more, i might as well go new.

Man, you can pick up an equivalent model for under $500 these days!
Edited by stevensly - 10/7/12 at 7:20am
post #1596 of 1978
Quote:
Originally Posted by stephensank View Post

Just ship the whole PS board to me. I can fix the modules. No question. PM me for details.

I can HIGHLY recommend Stephen's service. He fixed my board and sent it back to me at a fair price, with very quick turnaround, and completely tested. Thank you so much man!

Again, highly recommended.
post #1597 of 1978
Well, i finally received the A board, installed, and the darn tv is still blinking 12 times.
What else can be wrong!?! mad.gif
post #1598 of 1978
Quote:
Originally Posted by stevensly View Post

My TH-42PZ85U isnt powering on and the power button indicator is flashing 12 times pointing to a possible problem with the 'A' board.
Well, i finally received the A board, installed, and the darn tv is still blinking 12 times.
What else can be wrong!?! mad.gif

This document gives additional troubleshooting steps to take. It could be as simple as shorted speakers.
post #1599 of 1978
My less than 2 year-old P50G20 just went out. Wife was upstairs watching it when she heard a "pop". LCD light is now blinking at 10 blink intervals. Any advice on the best method in fixing this problem would be greatly appreciated.
post #1600 of 1978
Quote:
Originally Posted by spmurph View Post

My less than 2 year-old P50G20 just went out. Wife was upstairs watching it when she heard a "pop". LCD light is now blinking at 10 blink intervals. Any advice on the best method in fixing this problem would be greatly appreciated.

Ok so I unplugged it, waited ten minutes, then plugged it back in. Now it is blinking at 4-blink intervals.
post #1601 of 1978
Quote:
Originally Posted by spmurph View Post

Ok so I unplugged it, waited ten minutes, then plugged it back in. Now it is blinking at 4-blink intervals.

Found a service manual. Looks like it could be the A, SS, SC, or P Boards. Any one of these more likely to be bad than the others?
post #1602 of 1978
Quote:
Originally Posted by spmurph View Post

My less than 2 year-old P50G20 just went out. Wife was upstairs watching it when she heard a "pop". LCD light is now blinking at 10 blink intervals.
Ok so I unplugged it, waited ten minutes, then plugged it back in. Now it is blinking at 4-blink intervals.
Found a service manual. Looks like it could be the A, SS, SC, or P Boards. Any one of these more likely to be bad than the others?

Apparently the SC board is the most common failure for 4-blink and 10-blink symptoms, although other boards could be defective instead.

Simple test is to unplug the TV, disconnect connector SC20, and turn the power back on. See if the number of blinks change.
post #1603 of 1978
Thanks for the reply. Fortunately, I used my AmEx to purchase the TV so I filed a claim under their extended warranty program. If that doesn't work then I try to fix it myself.

I didn't realize this was such a big problem with Panny plasmas. CNET should mention that in their reviews mad.gif
post #1604 of 1978
Hi Tomwill,
i got a great deal on a set of speakers for $4.99 and installed them tonight.
When the tv is first plugged in, it blinks 5 times. After holding the the power button to reset, its steadily blinking 2 times.
I've wasted $135 trying to fix this (A board and speakers), time to junk it.
mad.gif
post #1605 of 1978
I got a TH-C42FD18 from a friend. Manufacture date October 2008 Here are the symptoms.

Plug in the TV maybe a click or two.
Push power button the red led comes on steady with a click or two. Fans also come on and screen back lighting comes on.
Screen stays black/grey color.
Set seems to power off with no problems.

I am not sure what might be wrong since there is no blinking. I have no problem opening the set and doing some checks but found nothing specific on the internet.
post #1606 of 1978
Quote:
Originally Posted by omlambu View Post

I got a TH-C42FD18 from a friend.
Plug in the TV maybe a click or two.
Push power button the red led comes on steady with a click or two. Fans also come on and screen back lighting comes on.
Screen stays black/grey color.
Set seems to power off with no problems.There is no blinking.

Several posts in this thread seem to indicate that the A-board is defective.
post #1607 of 1978
Quote:
Originally Posted by spmurph View Post

Thanks for the reply. Fortunately, I used my AmEx to purchase the TV so I filed a claim under their extended warranty program. If that doesn't work then I try to fix it myself.
I didn't realize this was such a big problem with Panny plasmas. CNET should mention that in their reviews mad.gif


Just an update. Tech came out and determined it was the SC board. Part is on back order. $250 plus tax to install and another $80 for the estimate. Everything was fully covered by AmEx extended warranty. I faxed them the estimate and receipt and the funds were put on my card the same day. I will never buy another appliance without it.
post #1608 of 1978
I have a problem with my 2 year old TCP50S2 plasma that has confounded the Panasonic service desk (after quickly telling me the warranty is expired) and a local authorized repair shop. When I plug in the tv it tries to turn itself on with a "click", the red power light comes on (no blinking) but no picture or sound. After 30 seconds it will turn itself off and immediately turn itself on to start the cycle over. No response from the remote. I am able to hold the power button to turn it off but it will turn itself back on as soon as I release it. The repair technician suggested it may be a faulty SC board but will charge me $75 just to look at it. Any ideas?
post #1609 of 1978
My TV died last night.

Model # TCP50UT50
Date of Purchase: May 2012
Symptoms: TV will not turn on. There are 8 Blinks of light before the cycle repeats.

I called Panasonic and was told to wait 2-4 days for a call from someone. No other info was given to me. mad.gif

I am not happy right now. I did some searching and found the code chart but only for 2011 models and older.
post #1610 of 1978
This appears to be the best forum for Panasonic's, except I haven't found a discussion of my issue. I'm hoping someone can tell me whether it can be repaired or not.

My plasma, model TH-58PZ800U, experiences an intermittent "red haze". Almost like you're watching infrared TV. Unfortunately, the red haze seems to be appearing more frequently over the past few weeks.

My repairman diagnosed the problem over the phone telling me that it is the panel and that it isn't worth repairing. He recommends that I buy a new TV.

Thank you for your recommendation.
post #1611 of 1978
Quote:
Originally Posted by VictorNYC View Post

My plasma, model TH-58PZ800U, experiences an intermittent "red haze". Almost like you're watching infrared TV.

Without a picture, it is hard to determine what you mean by "Red Haze". However, if you do a search on "solarization" or "red snow", you might find a solution.

This thread mentions that the D board caused the following problem:


Edited by tomwil - 11/13/12 at 7:36am
post #1612 of 1978
That's it! Thank you so much. Looks like it can be repaired if I can find those parts. I'll post a reply as soon as I have an update.

Thanks again.
post #1613 of 1978
my TV Panasonic model TCP58S2,was repaired for the same problem failing 6 months after the original equipment warranty had run out. After repair it has failed again with the same symptoms. This was 3 days after the Panasonic replacement warranty ran out. i have searched the web for this part knowing I can replace it my self but it's out of staock everywhere leading me to believe this is an inherent design flaw that Panasonic is unwilling to fix. The technician asked the engineer at Panasonic if there is a history of high failures with this board and they said NO. I believe they are covering this one up.


I have repaired my tv after finally finding the scan board. That did not fix it but I then replaced the upper scan board and the combination did fix it. One caution if you replace the upper scan board you can get inconsistent scanning due to poor contact on the connectors on the edge of the board. While viewing the image wiggle each connector till you get good contact and the scan interference disappears
Edited by Jim Silcott - 11/24/12 at 3:19pm
post #1614 of 1978
what I have learned is that it blinks 10 times when it first fails. If you unplug power connector from rear for a while and plug back in when you turn it on you get a new code. In my case seven blinks
post #1615 of 1978
hi is any one got the solution to this problem yet i got the same problem on my panasonic th37pd25 please help thanks
post #1616 of 1978
:)Is there anyplace that would buy a 4 year old 50" with a bad power board? I have decided not to get it fixed.
post #1617 of 1978
Quote:
Originally Posted by tomnan24 View Post

:)Is there anyplace that would buy a 4 year old 50" with a bad power board? I have decided not to get it fixed.

Call local repair shops. Maybe one of them will take it, but I doubt they will give you much, if anything for it.



Ian
post #1618 of 1978
First off thanks to all on this forum for their contributions. I have a 50inch panasonic with the 10 blink issue. I am ready to install the film caps on the MC301 and MC 201 as the master have suggested but cannot for the life of me find 1uf 50v film caps anywhere locally. I am from Hamilton Ontario Canada and have searched/called most shops that carry that stuff in the area. I am willing to purchase from an online supplier or ebay but am coming up empty when I search.

Could I please get some guidance on where to order some caps!!

Once again thanks to all for your input, would be lost without you.wink.gif
post #1619 of 1978
I was hoping someone here could help me.

I have a Panasonic TH-42PX75U plasma with the 10 blinking light issue.

First let me preface the issue:

I had the first problem with this plasma the week before last Christmas (2011) and the TV refused to power on, no red LED whatsoever. I researched the problem and found it was the power board. I bought a "fix-it" kit on eBay in January 2012 and that seemed to fix the problem, we then started a remodel and the TV sat for about 8 months until September 2012. I went to power on the TV and it booted up normally, then after 20 minutes, it shut down as before and wouldn't turn on. I checked the fuses and sure enough there were both blown on the power supply. So instead of diagnosing the power board further, I ordered a replacement board from TriStateModule (http://www.tristatemodule.com/p-4463-txnp1hntus-panasonic-tv-module-p-power-supply-tnpa4221ab-tnpa4221ak-th-42px75u-th-42pc77u.aspx). I installed the new power board on September 17th and the TV worked like a charm!

Fast forward to Thanksgiving day, I go to turn on the TV and it boots up, then within 3-5 seconds I see the TV form a red snowy haze and immediately power off and a 10 blink red led code is now flashing. I looked up this code in the service manual and it says it's a problem with the A-board.

I am so frustrated with this new problem, being I don't know if it's exactly the A-board. I've been researching and reading tons of problems like mine and some say it could be the power board again, even though the TV is powering on. So I called TriStateModule and they're replacing the board, since it comes with a 6 month warranty. I figure I'd start there and see if that fixes the problem, but who's to say it won't happen again in 2-3-6 months down the road. When the replacement power board comes and that doesn't fix the issue, I guess I'll be back to square one.

I ran across this post through my research: http://www.justanswer.com/tv-repair/36rvn-panasonic-th-42px75u-told-needed-new.html
However, I don't know where to begin. What trial and error fixes should I start with?

Does anyone have any idea how to fix this issue? Any tips or tricks? I'm shipping the board out tomorrow and I can try to diagnose this until then.

I called Panasonic and they told me I'd have to get the TV diagnosed and get an estimate to send to them, then they "MIGHT" help me pay for some of the repairs. Well the problem is the diagnosis from my local TV repair man is $98, then that would be applied to the cost of the repair. I do not feel like spending another $100 on top of the $100 I already paid for the power board.

I don't want to scrap this TV, but I just can't get over the fact it's only 5 years old and already failing at this rate. I have a 2005 and 2006 Panasonic plasma and they're both going strong, no problems at all (knock on wood). I also have a 2011 Panansonic Plasma I purchased last fall (before the 2007 model started having problems), but I got it with the 5 year warranty from Costco.

I've always bought Panasonic plasmas because they've had an ironclad reputation, but these problems with the 2007 model have really started to change my mind.

Any help would be greatly appreciated with this matter.

Thanks-
Edited by MVLJR - 11/26/12 at 3:58pm
post #1620 of 1978
I am pretty sure I have finally found some 1uf 50v film capacitors. Are these right for the MC 301 and MC 201 boards?

Thanks

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