42" Panasonic TX-P42C2E Plasma blinking fast green

[nostrike]

Hey all.

I have a 42" Panasonic TX-P42C2E Plasma blinking fast green,
and the screen is black/no picture.
when I turn it on.
I clicks, but power button flashes really fast something like 36-37 times
and goes steady green. Nothing on the screen.

The PSU is a :AASY NO LSEP1287
The mainboard is a:TNPH0829

I have tested the 4 fuses on PSU, they are all good.
I have unplugged X og Y boards, but same problem.

I will take pictures of the components as soon as possible.

Anyone have an idea what could be wrong?

Best Regards
Nostrike

[tom66]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

Does the set buzz while running?

[tw2005]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

Flashing green then steady is normal startup. dead/cracked panel? If a board has failed it's unusual not to get a red blink code. Any audio?

[nostrike]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

It does buzz while turned on from PSU (very quiet Buzz).
No sound with DVD player
There is a normal light in the Optical sound output on mainboard.

When turned on, after 2-3 minutes the PSU clicks 3 times,
After 2-3 minutes again it clicks 1 time og blinks red 13 times.


Pictures :

[nostrike]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

Found the Service Manuel.
13 red blinks means Sound SOS - A-board Speaker
So the A-board is defective ?

[tom66]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

I thought you said it was green not red?
Check for shorted speaker cables. Wires touching frame for example.

[nostrike]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

I thought you said it was green not red?
Check for shorted speaker cables. Wires touching frame for example.

Wrote before :

When turned on, after 2-3 minutes the PSU clicks 3 times,
After 2-3 minutes again it clicks 1 time og blinks red 13 times
(Keeps blinking 13 times, pause, 13 times.

[tom66]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

OK, sorry, did not see that. Check the speaker connections then.

[nostrike]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

OK, sorry, did not see that. Check the speaker connections then.

I know my way around TVs,
but how to test Speaker connection?

[tom66]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

Check the wires aren't broken or damaged, they are properly secured, and they have no connection/short to the chassis of the TV.

[nostrike]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

Check the wires aren't broken or damaged, they are properly secured, and they have no connection/short to the chassis of the TV.

Have checked them.
Not broken.
Not touching chassis
Looks normal.

[tom66]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

In which case I would suspect A board or DA board (depending on what this TV uses.)

[nostrike]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

A-board : TNPH0829 2A

My own conclusion was also the A-board
after testing, so I think you are right.

[livewire1]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

same issue here, well kind off.
got a TX-P42G10B which workS, but will sometimes not switch on. and just get flashing green LED.
have noticed a slight blowing of a cap on power board, going to replace that.
so did you get it working?

[nostrike]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

I am waiting for a new A-board.
I do not think we have the same problem.
I think your caps are bad.
When you replace them, it will work

[tom66]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

Panasonic do not use poor capacitors, it would be extremely rare to see them fail. Some of the larger caps can look slightly bulged due to mechanical tension, but it is an illusion.

[livewire1]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

replaced the cap.
same problem.
was able to look at it while it was in fault.
209 volts ok.
Led's on the SS and SC boards are lit.
So according to the service manual it says it's the A or D board, as I do not have a D board guess it's the A.

have managed to get an A board for £35 so will try that.

[livewire1]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

"A" board replaced.
been working ok for 6 days now, so guess that was it.

[tom66]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

Great! Thanks for posting back the fix, too. It will help others.

[karlpowell]

Re: 42" Panasonic TX-P42C2E Plasma blinking fast green

sorry to jump this thread , can you let me know where you sourced the TNPH0829 A board from and how much ?