14 blinks TC-P50ST30

[tom66]

Re: 14 blinks TC-P50ST30

As long as you do not unplug the set while upgrading, it's hard to screw it up.

[nwflight]

Re: 14 blinks TC-P50ST30

If I could get my tv on to the internet is there a way to do it directly?

[tom66]

Re: 14 blinks TC-P50ST30

As far as I know, only through SD card or USB.

[nwflight]

Re: 14 blinks TC-P50ST30

Done. A bit nerve wracking. Was at 2030 now2220.
Thank you for all the help. My wife thinks I am smart.
Next is a Acer 26 LCD with a broken on off switch.
Asked the local Source store when I was getting the SD cards if ever they have flats screens heading to the dump let me know. He gave me this return along with the original box and manuals just have to phone for the remote today.

[nwflight]

Re: 14 blinks TC-P50ST30

My tcp50st30 does not have any fans and it was one of the warmest days of the year when it died although my basement is never that hot. Would it be worth attaching a couple of fans on it? Or am I getting too paranoid.?

[tom66]

Re: 14 blinks TC-P50ST30

No fans? Panasonic used to include fans in all their models... a plasma which is as thin as this would really do with having fans.

[nwflight]

Re: 14 blinks TC-P50ST30

I saw them at the top on some of the photos on the forum. Mine is rated at 341 watts. I think I will put a couple of muffin fans to assist in bottom to top flow.

[tom66]

Re: 14 blinks TC-P50ST30

341 watts... My 480 watt older generation (2008, yours is 2011) 46" uses four fans and it has a fat chassis with plenty of air flow. I bet most of these Panasonics are dying due to heat.

[nwflight]

Re: 14 blinks TC-P50ST30

My daughter in law has being doing battle with Sears and Panasonic on my behalf ( they bought the tv for me). Panasonic did not even return calls but Sears has come through with 300$ in gift cards. This will cover the repairs!
I am so happy to still be able to use my Sears card. Thank you Sears , I will buy some 3d glasses.

[tom66]

Re: 14 blinks TC-P50ST30

That's nice of the retailer to contribute. You don't have to use Panasonic 3D glasses on this. Most $20 universal glasses will work.

[powertechnics]

Re: 14 blinks TC-P50ST30

1

personally i'd be taking panasonic on for an out of warranty repair. I don't know what consumer laws you have there but in 2011 over here they introduced laws which state the item needs to be fit for the purpose and last what would be considered a reasonable amount of time.

18 months is too short, sadly it seems be a common issue. Over here we have consumer affairs to challenge these situations, just depends how much effort people are prepared to put in to fight it.

Sounds like shorted vsus at startup, highly likely it won't be a fuse.

A snip from the 2011 fhd plasma training guide st30

shutdown but no blink code - power led stays on (check for shorted vsus* / vda** / p15v).
•
2 – 3 – 5 blinks are not used.
•
changes – 2010 models > sc20 disconnected = 6 blinks .
2011 models > sc20 disconnected = 8 blinks.
•
13 blinks -> internal communication error on a board.
•
14 blinks -> loss of f15v from p bd. P6/pin 10 or a bd detection.
•
decrease of sos detect time when sc20 is disconnected (no false det)



another snip

no blink, solid red

lsi error

shorted vsus ,shorted vda, shorted p15v
..............................

14 blinks

this code is triggered if there are abnormalities during data exchange with the standby cpu rom.

No f15v connected to the a board at plug-in (open connection of both pins 10 & 11 between p6 and a6) shorted f15v developed after the tv is up and running. Holding the power switch for over 5 seconds after the unit has gone into shut down and it's in lock mode with the power led solid red (note: The led stays on if the power button is momentarily pressed).

[nwflight]

Re: 14 blinks TC-P50ST30

Been running fine for 6 months. I have a sc card that I replaced some mosfets but never tested that I will never use if anyone wants it. and some spare mosfets.

[northwestdad]

Re: 14 blinks TC-P50ST30

I purchased this TV hoping I could repair it and use it in my man cave. I knew the TV wouldn't power on when I bought it, but I figured $100 was a fair price to see if I could make it work. When I got it home and plugged it in, the red LED powered up but no screen image and none of the buttons worked on the TV or Remote, and I couldn't turn it back off without unplugging the cord. After reviewing the issue online, I plugged it back in, turned it on, waited for the red LED to appear, and then held the Power Button on the unit in for 5 seconds or so and that's when I first got the 14 blinks. Downloaded the service manual for this model and discovered the 14 blinks was related to a faulty main board. I ordered a replacement board off eBay for $75 and hooked it all up. Now instead of a blinking LED, I get no LED at all but a relay that clicks every 7-8 seconds or so. Just to experiment I hooked up the old main board to the set, powered it up and got the blinking LED again. Re-connected the replacement board and still just the clicking relay with no LED.

I'm not a technician and I don't own a voltmeter, but it seems to me if there were an issue with the power, I wouldn't be getting any LED or relay clicking at all. I'm wondering if I purchased a bad replacement board, or if it could simply be a blown fuse (there are 5 of them, all ceramic). The service manual isn't much help in this area and the fuses aren't held in by clips but by end-caps which I'm afraid of damaging if I try to remove them needlessly.

I'm hoping someone out there has solved a similar problem or has some thoughts on how I should proceed before spending more money replacing things that don't need replaced.

[tw2005]

Re: 14 blinks TC-P50ST30

I purchased this TV hoping I could repair it and use it in my man cave. I knew the TV wouldn't power on when I bought it, but I figured $100 was a fair price to see if I could make it work. When I got it home and plugged it in, the red LED powered up but no screen image and none of the buttons worked on the TV or Remote, and I couldn't turn it back off without unplugging the cord. After reviewing the issue online, I plugged it back in, turned it on, waited for the red LED to appear, and then held the Power Button on the unit in for 5 seconds or so and that's when I first got the 14 blinks. Downloaded the service manual for this model and discovered the 14 blinks was related to a faulty main board. I ordered a replacement board off eBay for $75 and hooked it all up. Now instead of a blinking LED, I get no LED at all but a relay that clicks every 7-8 seconds or so. Just to experiment I hooked up the old main board to the set, powered it up and got the blinking LED again. Re-connected the replacement board and still just the clicking relay with no LED.

I'm not a technician and I don't own a voltmeter, but it seems to me if there were an issue with the power, I wouldn't be getting any LED or relay clicking at all. I'm wondering if I purchased a bad replacement board, or if it could simply be a blown fuse (there are 5 of them, all ceramic). The service manual isn't much help in this area and the fuses aren't held in by clips but by end-caps which I'm afraid of damaging if I try to remove them needlessly.

I'm hoping someone out there has solved a similar problem or has some thoughts on how I should proceed before spending more money replacing things that don't need replaced.

The answer lies within this thread.

Most likely Shorted vsus on startup due to failed SC board. You can confirm this by disconnecting SC2 cable and measure the resistance across the pins at the SC board.

If you disconnect SC2 and try to turn on it should attempt to startup and then quit with a blink code.

As for the replacement A board, send it back if you can. not sure about the different reaction to your original so it maybe faulty anyway. Is the board the same model and revision(TNPH0912AS or TNPH0912AC)?

you won't know until the SC is good. I don't expect you'll be needing the new board but you need to confirm if it is the SC board.

fairly common fail with these , If you have a 55" model, SJ has plenty but none for the 50".

A few have had sucess with repairing the board themselves.

[northwestdad]

Re: 14 blinks TC-P50ST30

Thanks for the quick response tw2005. I'll disconnect the SC2 cable and see if that generates a blink code. The replacement board was the same suffix (AC). I made the mistake of ordering an incorrect suffix (AT) previously which I found out was for a 55" unit. When I connected it I still had the 14 blink. I was figuring this newest board I received was DOA and will be sending it back.

[northwestdad]

Re: 14 blinks TC-P50ST30

Unfortunately nothing seems to resolve my issue. I bought a multimeter last night to test for any fails and followed the Technical Service Manual but couldn't find any solutions.

I haven't found anything online that describes what causes a relay to simply keep cycling over and over.

[tw2005]

Re: 14 blinks TC-P50ST30

Unfortunately nothing seems to resolve my issue. I bought a multimeter last night to test for any fails and followed the Technical Service Manual but couldn't find any solutions.

I haven't found anything online that describes what causes a relay to simply keep cycling over and over.

is not that only with the replacement A board? original & 55" gave 14?

I have encountered that and for me it was a bad(shorting ) SPI Flash chip on the A board caused by my poor choice of flux, TV continually rebooted. When i fixed it, my ROM Read/error count was 114, normally 0.

[northwestdad]

Re: 14 blinks TC-P50ST30

Correct. The original A board had the 14 blink issue, I ordered a replacement but didn't get the correct suffix (AT when what I needed was AC). I didn't realize the error until I installed and tried the TV and it had the exact same issue (14 blinks). I was able to return the incorrect board and ordered 2nd replacement board with the correct suffix, and upon installing it simply got the relay clicking continually (no LED lighting up at all).

Before I send this newest board back, I wanted to make certain it's not something else, or at least have reasonably simple way to test if the board is itself is junk

Again, this is all brand new to me and I'm learning as I go. I don't have the tools nor expertise to fix a board at the component level, bit am comfortable swapping out capacitors or something simple like that. I'm also watching some YouTube videos to self educate on how to use a multmeter. I definitely appreciate you guys sharing your knowledge. I'm actually having my two teenage sons help me with this and we are learning together.

[northwestdad]

Re: 14 blinks TC-P50ST30

The answer lies within this thread.

Most likely Shorted vsus on startup due to failed SC board. You can confirm this by disconnecting SC2 cable and measure the resistance across the pins at the SC board.

If you disconnect SC2 and try to turn on it should attempt to startup and then quit with a blink code.

As for the replacement A board, send it back if you can. not sure about the different reaction to your original so it maybe faulty anyway. Is the board the same model and revision(TNPH0912AS or TNPH0912AC)?

you won't know until the SC is good. I don't expect you'll be needing the new board but you need to confirm if it is the SC board.

fairly common fail with these , If you have a 55" model, SJ has plenty but none for the 50".

A few have had sucess with repairing the board themselves.

Interesting....With the original A board installed, I disconnected SC2 as suggested and then plugged the TV in. I used the power button on remote to turn the TV on, I hear the the click, the red LED lights up, but that it's...just like it has been doing. But hitting the power button again turns the TV off (confirmed by a soft click a few seconds later). Reconnecting SC2 brings back the 14 blink issue. Does this indicate a bad SC board perhaps?

Also, not positive I did it right, but the multimeter read 0.3 - 0.1 (bounced around a bit...it is a $40 multimeter so not expecting it to be too precise) when testing the resistance of the SC2 pins on the SC board. I don't know what value you'd expect to find.

[tw2005]

Re: 14 blinks TC-P50ST30

SC2 is shorted then and is most likely the fault. Try disconnecting SC2 and SC20 ribbon.

THEN power up, should be 8 blinks. If it does then fairly confident only the SC but buffers should be checked also.

because i don't know the set well enough this may or may not work , disconnect sc2, ss11, p35 and 3 white ribbons at the A board and powerup.

hopefully turns on but some of these have the signals routed different so may not

TV could be locked out but with these new tvs I only know what i've read and so far either locked solid led or the 14 blink has been the SC shorted so the advice I've given has worked out but as always there can be an exception.

I'm sure we'll work it out eventually. You've tried 2 boards with 14 blinks so that's a good sign it's not the A, the clicking board just confuses things a little but I suspect it was dud.