Panasonic TC-P54VT25 _1 Blinking Code

[tom66]

Re: Panasonic TC-P54VT25 _1 Blinking Code

You could swap the board, see that you get no 1 blink, then shell out for a new one. You -could- try transplanting the EEPROM from one to the other, but you could end up with two bad D boards by the end, so only do if you are careful and think you can do it.

[multimeter]

Re: Panasonic TC-P54VT25 _1 Blinking Code

im not into plasmas,but that cap next too p11 connector,(2 brown 1 white)) looks bulged on the top to me,maybee the light ,i dont know

[Frank3y3]

Panasonic TC-P54VT25 _1 Blinking Code

Numbers on the chips and the boards are the same. Can it be programmed differently in this case or it's really the same for the 50 and the 54 ?

How can I post a Video ? Do I post a link for youtube ?

[tom66]

Re: Panasonic TC-P54VT25 _1 Blinking Code

I don't think it'll make much difference, my discussion applies for 54" -> 50" and vice versa.

[Frank3y3]

Panasonic TC-P54VT25 _1 Blinking Code

Would it be wiser to put D-Board 54VT25 into 50VT20 instead?

[tom66]

Re: Panasonic TC-P54VT25 _1 Blinking Code

The main difference between 50" and 54" is they will have different drive patterns for the panel.

So I think a 50" board in 54" may have mal discharge (pixels not fully illuminated), sparklies (incorrectly discharging pixels), pink tinge, image retention or TV could just go straight to 6/8 blinks due to ERC voltage slump.

Then again, 50" and 54" are quite close size wise. So, it's possible the differences are only minor. If it were 65" D board in 50" I would be more skeptical.

I don't think it'll cause harm, but it may not work - still, could be a useful diagnosis.

[Frank3y3]

Panasonic TC-P54VT25 _1 Blinking Code

God, 20 000 hours and still looking like new, well, glad to hear that. I did brought my laptop when i bought the VT20 yesterday, with some white, black, green, red and blue slides to check the screen carefully, no burn in or anything, no scratch on the screen or the bezel, '' juste des fameuses égratignures sur le pied, mais on s'en fou hein '', meaning, only scratches on the stand, doesn't really matter.

Alright, so do you think i can Swap the D board, On the VT20 it's : TNPA5149 AC 1D, and on the VT25 TNPA5149 AD 1D. Don't really want to mess the two of them.

Ok, by the time i was writing my posts, tw2005 answer is a guess, well, i think i'll try it anyway.

[tw2005]

Re: Panasonic TC-P54VT25 _1 Blinking Code

Hi again Tom, pleasure to hear from you. Is the D-Board the one called Logic Board. I've put a picture again.

I'd like to know whta you think about a VT20 with 8000 hours on it already, be free to answer whatever you feel.

On the VT20 it's : TNPA5149 AC 1D, and on the VT25 TNPA5149 AD 1D, can i swap these two ?

I doubt anyone here has tried it. Pretty rare getting a post for this series 3D. see plenty for the standard FHD, I have the 50V20.

My expectation would be the picture may display smaller or wrong not that I've tried a smaller size A board in a larger model e.g 42 in a 50.

Most likely the only difference between the D boards would be the data loaded onto the EEPROMs.

You're a pioneer at this stage but could help you progress the fault finding or you take a gamble and replace that board but they appear to be around the $100 so not cheap if we're wrong.

[tom66]

Re: Panasonic TC-P54VT25 _1 Blinking Code

Yep that's the D board.

8,000 hours is nothing... I have bedroom LCD with 25,000 hours, living room plasma with 13,000 hours, all as good as they were new.

There is a pic on this forum of a 50 inch Pioneer plasma with 72,000 hours only requiring a voltage tweak to get a good picture.

[Frank3y3]

Re: Panasonic TC-P54VT25 _1 Blinking Code

Hi again Tom, pleasure to hear from you. Is the D-Board the one called Logic Board. I've put a picture again.

I'd like to know whta you think about a VT20 with 8000 hours on it already, be free to answer whatever you feel.

On the VT20 it's : TNPA5149 AC 1D, and on the VT25 TNPA5149 AD 1D, can i swap these two ?

[Frank3y3]

Re: Panasonic TC-P54VT25 _1 Blinking Code

Here's the other pics.

[tom66]

Re: Panasonic TC-P54VT25 _1 Blinking Code

There is a D board in that photo. Green board right below PSU. It handles the 3-D image processing and plasma panel control that is now on A board on newer sets.

[Frank3y3]

Panasonic TC-P54VT25 _1 Blinking Code

Thanks for the reply after a long night. I swap the A-board considering what Tom told me, with the THPN0835 1A being the same on the VT20 and the VT25. I don't think none of these have a D-Board, or i'm not looking at the right place. I haven't try to put the A-board from the VT25 in VT20 or the power board. What i'm wondering is, if the panel was short or the chip dead on the ribbon cable, the TV wouldn't work for 60 hours straight after plug in plug out power on...... Here's some pictures with a good digital camera, if i need to take those photos again with better picture, no problem.

Thanks again. aprreciate the time.

[tw2005]

Re: Panasonic TC-P54VT25 _1 Blinking Code

Interesting, so both A boards throw a 1 blink in the 54" and both PSU. So I assume the VT20 is reliable.

What happens with the 54" A in the 50"?

Do both of these TVs have an extra digital board , D-board?

Don't know if this will prove anything but when you get the 54" running, try running the self check listed in the service manual and see if everything shows "ok".

The other thing I'm thinking is the D board TNPA5149. They are different revisons for each size but since you swapped the A boards for different sizes and the TV turned on might be worthwhile swapping the 50 D board but I have no idea if anything bad can happen doing this.

1 blink is listed as panel info SOS, PD4 start SOS. All that appears to be located on the D board where normally in the TVs with just an A board it would be located there.

That's the board I'd be suspect of at this stage.

EDIT: I have had SOS 1 on a basic 2010 HD model, was a bad EEPROM for the PD4, IC9304 on yours but mine never started no matter how many times.

[Frank3y3]

Hi everyone,

First of all, english is not my first language. Really glad to be here, read a lot, and i have a long story, hope you're patient and ready to help, i really want to fing what the hell is happenning. Since a month now, i'm having weird problem with a Panasonic TC-P54VT25.

One day i tried to turn on the TV and the red light started flashing. So i've unplug the power cable a plug it again and same thing. Since then, when i plug the cable i hear the relay click, 5 seconds later, i hear the relay click again. Then, when i try to turn to TV on, the red light will turn on and 3-4 seconds later i hear the relay click and the light flash each 3 seconds.

So just to be clear, the light flash....3 seconds pause...the light flash...3 seconds pause.....And continue that way....

In the beginning, because i didn't want to believe my TV was good for garbage, i've begin to unplug and plug back the power cable and immediatly powered the TV on. Each time i was able to get the TV working. Sometimes i had to plug, unplug the power cable 6 times, other time 15, 32 or 19. But each time the Tv finaly turned on.

I took the TV to a repair shop after i called Panasonic, they refered me to this shop. The guy told me the panel was short and a chip on a ribbon cable was dead.

So i took back the TV and did the same thing. Plug out, plug in, power on. The TV ALWAYS turned on, just like before, after 2 try, 6 try, 25, or 32......

So i took a chance and buy a TC-P50VT20 ( with 8000 hours, you may tell me what you think about that, because i though the TV was brand new like, little bit scared with that 8000 hours in three years, anyway ), because i read that the A-board and the power supply board were the same model number.

Just to let you know, i've chat with Tom66 on a different forum and we finally try to swap the A-board. So i' unstall the A-board from the TC-P50VT25 and installed it in the TC-P54VT25. Didn't turn on the first time, neither the second, but on the third it turned on. So i turned it off, and after that same story, would turned on after 6 try, sometimes 23, or 15, but ALWAYS turned on.

Next step, i swap the power board from the 50VT20 in the 54VT25, same story again. Put back i place each TVs, and it's been all night right now and the 54VT25 is turning on, but i've to be plug and unplug and plug and.....

I've some knowlodge in electronic, but i was reading things about ICXXX, and jumped PIN XX to PIN XX, bought the TC-P54VT25 Service Manual Chassis, but i'm a little bit scared to blow out the TV, so i'm careful. The TV doesn't work like it suppose, but with patience it work. Last time it turned on, i've let the TV on for 60 hours with no problems at all.

I'm really wondering what the hell is wrong, if the panel was short or the chip on the ribbon cable like the guy at shop said, the TV wouldn't even work, right ? Why would it sometimes turn on and work flawlessly, but sometimes the famous 1 blink code.

I've inspect bad caps, check the fuse, burnt on bords, i'm really lost here. Because i know the TV would finaly turn on after plug and plug and plug, and don't want to put it i the garbage right now. I called Panasonic a few times and they said they will offer me a rebate on their new LCD 2014.

( I would also appreciate if you share what you think about a 8000 hours VT20 plasma, really though it was new ), But right now, anybody who wanna jump in, be my guess..... Hope it wasn't to long for a first post, maybe because it's been a month of research, been up all night long, and on this TV for a week now ( I'm out of work right now so).

So thanks guys, i reaaly though i had it when i bought the 50VT20 and swap the A-board, but same problem again, what you think.

Frank

If you need Picture no problem, Service manual, Service menu picture, anything to solve this mystery