Panasonic Plasma TV LED blinking 12 times

[tw2005]

Re: Panasonic Plasma TV LED blinking 12 times

Hello Badcaps Forum. I found this board looking for an answer to my "12 Blink" issue on a Panasonic TC-P42S1 plasma. I've read about everything on here and other websites trying to determine if I can fix it for about $200 or so. If not, I'll probably buy new.

The TV is about 3-4 years old and has had no issues until one day on power down, we heard an additional click after it shut off and immediately the SOS light started flashing.

Here's what I've checked:
- unplugged SC board, 12 blinks
- unplugged SS board, 12 blinks
- unplugged both SC & SS board, 12 blinks
- Checked standby and power on voltages coming into A board and all are correct
- no shorts in speaker wiring or speakers
- connected speaker to alternate signal source and the speakers function properly.

By all I've read here and from other sources, it's the A board. However, my A board (TNPH07861A) isn't available many places other than used ones on Ebay with prices from $120-212.

My questions:

1. How critical is the board version? I have found TNPH0786AF at ShopJimmy & TNPH07862A versions. (I'm assuming they wouldn't work or can't be changed)
2. Is there a way to bypass the sound amplifier altogether and just use a sound bar?
3. Has anyone used ModusLink PTS (http://www.moduslinkptstvboards.com/txn-a1efuus/) for board repair? (This is the direction I'm leaning)
4. Is there anything else I should do/check before reinstalling a replacement A board?

Any other suggestions would be appreciated. Thank you in advance!!

Little curious about the part number you've quoted TNPH07861A, sounds like the PCB print number.

What other numbers can you find stamped on the board or a white sticker but not the one on the tuner module?

A few have had SC boards repaired/refurbed at moduslink, can't remember reading any bad reports.

[EIEIO]

Re: Panasonic Plasma TV LED blinking 12 times

Hello Badcaps Forum. I found this board looking for an answer to my "12 Blink" issue on a Panasonic TC-P42S1 plasma. I've read about everything on here and other websites trying to determine if I can fix it for about $200 or so. If not, I'll probably buy new.

The TV is about 3-4 years old and has had no issues until one day on power down, we heard an additional click after it shut off and immediately the SOS light started flashing.

Here's what I've checked:
- unplugged SC board, 12 blinks
- unplugged SS board, 12 blinks
- unplugged both SC & SS board, 12 blinks
- Checked standby and power on voltages coming into A board and all are correct
- no shorts in speaker wiring or speakers
- connected speaker to alternate signal source and the speakers function properly.

By all I've read here and from other sources, it's the A board. However, my A board (TNPH07861A) isn't available many places other than used ones on Ebay with prices from $120-212.

My questions:

1. How critical is the board version? I have found TNPH0786AF at ShopJimmy & TNPH07862A versions. (I'm assuming they wouldn't work or can't be changed)
2. Is there a way to bypass the sound amplifier altogether and just use a sound bar?
3. Has anyone used ModusLink PTS (http://www.moduslinkptstvboards.com/txn-a1efuus/) for board repair? (This is the direction I'm leaning)
4. Is there anything else I should do/check before reinstalling a replacement A board?

Any other suggestions would be appreciated. Thank you in advance!!

[PaulF]

Re: Panasonic Plasma TV LED blinking 12 times

Following checks on the speakers & wiring I have ordered a replacement 'A' board.
Are there any adjustments required following fitting of this board? i have most basic test equipment eg. multimeters, oscilloscope etc.

[PaulF]

Re: Panasonic Plasma TV LED blinking 12 times

Thanks for the info Tom66.
Good job I asked, thought it was the power board.
I'll investigate and post my findings.

Much appreciated.

[tom66]

Re: Panasonic Plasma TV LED blinking 12 times

12 blinks is sound SOS. From PX75 manual, a similar TV:


This can be:
- bad/damaged speaker (shorted)
- wiring shorted together, or to frame
- A board fault

[PaulF]

My Panasonic TH-50PX70B TV has developed a fault indicated by the red LED blinking 12 times. I have searched the internet and the blinking LED fault codes seem to differ between models. From some comments on this forum I think it is most probably the power board.
If a can be sure it is this board I would be happy to replace it. it would be even better if I could repair it.
Does anyone have any more info on this model or can give me some pointers on tests to identify where the problem is.