Panisonic TH-42PZ800b six blink fault

[Paniman]

Hi everyone

Please can someone help I have a Panasonic TH-42PZ800B that was given to me as part of a house clearance. I was given to understand that the set had not been used for some time and was stored in a garage covered up

The first thing I did was clean out the back of the set removing all dust where possible without removal of boards or cables.

I then test the set with no AV inputs it worked! the set did not come with remote or brackets but did come with base,I then. Found some bracket and a genuine remote.

The TV has been stored in my house waiting for brackets and remote.Yesterday I decided to remove the cheap Techwood and replace with my New to me Panasonic.

I turned it on happy days until 20 mins later the picture turned negative but with mostly white. So I turn the set off and back on no picture but sound and no blink codes.
I then left the set for 20 mins and it worked but only for 5 mins.
So I removed the set and removed the back cover to check psu and connections all good . When I turn the set back on I only had half the screen (right hand side only) so I removed and reinstalled all ribbons on the buffer boards on y sustain (SU and SD) and x sustain ( SS) I also removed and refitted all ribbon cables and connectors to T-con (D) I also removed and reconnected the C1 and C2 data driver boards

I then turned on the TV and the display worked but was black no snow I then removed the SC20 ribbon and reinstalled in my frustration I retired to bed with out further testing.

This morning I got up and turned on the set and it worked for 30 mins so thinking I may have fixed it I connected up to the sat and DVD it worked for a further 2 hours with no problem but wait for it! the negative white image came back for 30 sec and then the picture was good again for a further 20 mins then whilst have lunch with the family in the other room a loud crack was heard I come into the lounge and the TV was off with the six blink showing on the led

Manual says driver SOS1 (SC energy recovery circuit) SU SD and SC

A very knowledgable chap in the UK suggest this forum for help his opinion was that the loose sc20 connection may have caused a bad waveform to take out the SC board but this fault is very very rare!

Sorry for the long story but thought it best to give the full story from start to finish

Many thanks

Regards

Paniman

[tom66]

Re: Panisonic TH-42PZ800b six blink fault

That was probably me, from Sordids on eBay right...? That's not me, but some advice I passed on to him.

A loud pop and 6 blinks can really only indicate an SC board fault. Usually, the SU/SD survive but there is a way to be sure. 6 blinks is pretty rare but we have seen it on other Pannys (7 blinks is most common and that can definitely be risky to the buffer boards.)

Now since the picture was going bad, there is a possibility that the D board (T-con equivalent) was causing this. It is also possible it is a coincidence, or if the SC20 cable was not seated properly or it came loose, this could happen too.

Pictures of parts inside the set would go a long way to helping us diagnose it.

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

Hi

Yes it is me from eBay

Many thanks for yet more info.

I rechecked the connections as you said all good. Do you want detailed photos of all the boards and areas if so I will come with these tomorrow and post here

Many thanks

Regards
A
Paniman

[tom66]

Re: Panisonic TH-42PZ800b six blink fault

Pictures of all the boards would be useful, and one of the whole set. The PZ800B is related to the PZ80B but has a different layout, I believe. The parts are usually interchangeable, except for the main board which has 4 HDMI port support (3 HDMI rear & one HDMI on the front.)

Can you confirm one thing - on the SC and SS board there should be some small LED lights, do these light up at all now once plugged in?

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

Hi tom

Here is some photos

Just to let you know the green LEDs on on the sc and SS boards are lit until the auto shut down followed by the six blink on the front

Regards

Paniman

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

SC board

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

Power supply

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

SS board

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

D or t-con board

[Alastair E]

Re: Panisonic TH-42PZ800b six blink fault

Well, We Sure cant find any faults visually--With THOSE photos!!

Any chance of some Clear ones of the SC and SD....?

[tom66]

Re: Panisonic TH-42PZ800b six blink fault

As Alastair says it's hard to see much detail in those photos.

Remember we don't have the luxury of seeing what you can see, and we don't have the chassis in front of us. So clearer photos are necessary.

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

Hi Alastair and Tom

Yes I know the photos are poor, I have taken some better ones but my p.c has died so I am unable to upload from DSLR. Unless it's the iPad camera (Hence the poor photos)

I will get some photos posted via a photo bucket link once I have sorted the PC (tomorrow hopefully)

What I can say is they are no obvious faults that I can see ie swollen caps or burning on the boards (of cause we all know that a non swollen cap does not mean there good) dame these electrolytic caps!!!

But the boards have the same numbers that Tom has for sale at the moment ie SD,SC,SU and SS

[Alastair E]

Re: Panisonic TH-42PZ800b six blink fault

With a Panasonic, its VERY Unlikely to be Caps anyway!

More likely dead IGBT's, MOSFETS, Chips, Thermal-Fuses, or surface-mount multi-layers.....

--Basically everything BUT an electrolytic capacitor....

[sordids999]

Re: Panisonic TH-42PZ800b six blink fault

No its me who has them for sale
but I want to be sure you need my parts before u buy them due to myself having a few returns for wrong diagnose

Thanks

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

Thanks Alastair glad you put my mind at rest re the caps!
Sordids999 sorry to get confused with tom

Photos will be uploaded tomorrow

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

Hi Guys

Heres the photos I promised

http://i1302.photobucket.com/albums/...psdddfda7c.jpg

http://i1302.photobucket.com/albums/...ps30d77d38.jpg


http://i1302.photobucket.com/albums/...ps724ad96c.jpg

http://i1302.photobucket.com/albums/...ps89b639fb.jpg

http://i1302.photobucket.com/albums/...ps8b3402a8.jpg

http://i1302.photobucket.com/albums/...ps2b618310.jpg

http://i1302.photobucket.com/albums/...ps8b4eddca.jpg

http://i1302.photobucket.com/albums/...psd0bb2bb1.jpg

http://i1302.photobucket.com/albums/...psbad619bb.jpg

http://i1302.photobucket.com/albums/...ps7a847aaa.jpg

http://i1302.photobucket.com/albums/...ps67d85d61.jpg

http://i1302.photobucket.com/albums/...ps67d85d61.jpg

[sordids999]

Re: Panisonic TH-42PZ800b six blink fault

updated pictures

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

Hi guys

What do you think I should do next?

Many thanks

Paniman

[tom66]

Re: Panisonic TH-42PZ800b six blink fault

I think it would be a good idea to remove this part:
https://www.badcaps.net/forum/attach...5&d=1414610956

And check for damage, burn marks, etc.
If there are none obvious a multimeter will have to be used to find short circuits.

[Paniman]

Re: Panisonic TH-42PZ800b six blink fault

Hi tom

Have removed the board and will check it out this evening after family time

Is it possible that the loud pop herd just before the 6 blink code could be a fuse on the powersupply (P) board that would have been taken out by the fault on the SC board?

Will report back later.

Thanks

Paniman