Panasonic Tx-P42U30B Vertical Multicoloured Lines

[Steve323f]

I have had this TV for about a year and half bought from Comet which is now in administration. Basically long story short i cant get it fixed as i dont have the reciept. So i have no other choice than to fix it myself.

I was just watching it and all of a sudden these strange vertical lines appeared in varying colour from green to purple. They cover about a 1/3 rd of the middle of the television and the top and bottom third is basically completely black.

I contacted a professional on Fixya who insisted that it was the xsus board. So i bought one and replaced it and it was still exactly the same. I have spoken to another person who insists it is the Y board. Before i commit i would like to hear some news other than "it cant be repaired"

I will post i picture of it below.

[Steve323f]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Here is a picture, apologies for having to tilt your head to the left as it was taken on my i phone.

Oh and my apologies i forgot to add that when i try to press any buttons on the side like the volume or channel change the lines expand or shrink or just move.

[tom66]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Personally, it looks like a bad panel to me! Sorry!

Take a look at this document, last page:


You can try checking that 3.3V short thing on the page before and the page before that.

[Steve323f]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Hi Tom, thanks for the reply. On page 27 the symptoms are described exactly where it says 2011 model. The position/length of the colourful bars change position and length when volume or channel buttons are pressed.

My son pulled out his headphones about a fortnight before it broke and he ended up breaking off a HDMI cable with part of the metal left inside the TV, i had to use a set of fine pliers to remove the HDMI part. But it was ok for a fortnight before. If i took a video of the symptoms would that help at all??

[tom66]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

A video might help. Also, I can suggest a couple of voltage checks with a picture of the board layout in your set.

If it does turn out to be a defective panel, you should have a right to make a Sale of Goods Act claim (valid for up to 5 years in Scotland.)
http://www.which.co.uk/consumer-righ...e-of-goods-act

[Steve323f]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Here is a video of the little sod in action!

http://s494.photobucket.com/user/swe...bf8e2.mp4.html

Unfortunately i dont have a multimeter and i have little experience with one. The board layout is the one in the guide but i have taken some photos also.

[Steve323f]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Picture 1 it the complete board layout.
Picture 2 i think is the y sus board along with the C1 board at the bottom
Picture 3 is the PSU i think
Picture 4 is the main a board with the xsus board underneath and the C2 at the bottom

[Steve323f]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Also one last thing which i never noticed before. There is quite a loud buzzing sound coming from the Y-Sus board and there is a green led lit up.

[tom66]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Both those are normal.

We can guide you through the meter tests if you can borrow one or buy one (Maplin sell a half decent one for under £10.)

You can also try another test. Along the C board, I would unplug all the ribbon connectors which correspond to a dark patch on the screen. The only one which looks completely dead is near the middle. I'd take that out and leave the others in. (Only do this with power OFF!) Then see if you get a picture minus that bar.

If so, that would confirm bad data driver IC, which is unfortunately a nonserviceable item. It needs a new PDP, which isn't cost effective, so I'd see what you can do about claiming under the Sale of Goods Act because quite frankly that's a pathetic lifespan for a TV...

(Note: SOGA - You do NOT need receipt. A bank statement/credit card statement is sufficient, presuming you did not pay in cash, and if Comet are bankrupt, then you can claim with Panasonic UK.)

[Steve323f]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Yes if you could guide me through that would be great. I have done basic stuff using the multimeter with resistance on ABS sensors and also on car batterys. I will go and buy one tomorrow.

I opened up the telly again and tried to access the ribbon cables but it would be a major pain as the ribbon cables are only about 8mm in length so i think i would have to remove the ysus completely then re-attach it with the one missing ribbon cable. I have managed to find an exact match to my tv selling for spares and repairs that has no picture or sound at all (he says its a software issue) but powers up. Do you think it might be worth a shot buying it seeing as its only £25.

Unfortunately i bought the TV cash so i have contacted panasonic direct a fortnight or so ago and basically without any reciept or proof of purchase they will not be interested in it. Besides its just under a 100 mile round trip to drop the TV off at their nearest branch to me TWICE and i would be responsible for fee's for them to decide that it is broken.

Here is a video of the TV hooked up to sky (there was a green/red alternating line appearing which i never saw before) and the sound still seems ok.

http://s494.photobucket.com/user/swe...9ae8a.mp4.html

[tom66]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

I would jump on that TV if it is not a cracked panel or has lines etc.
Worst case -- take good boards out of yours, swap 'em in & have a nice TV for £25.... then sell whatever's left over for spares.

Sounds like typical Panasonic.

I really like their older products (I kept two PZ80 plasmas...) but their newer plasma products are terrible for reliability, they appear worse than Samsung (which always had tons of issues with their TV models due to cost cutting.) Great picture -- but terribly unreliable.

And their support is abysmal. Pretty much not bothered once you're out of that 1 year warranty.

[tom66]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

BTW, for the ribbons, I mean the ones running along the bottom of the PDP.
It looks like all you need to do is remove the stand assembly and you can access them.

[Steve323f]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Apparently the 2nd TV has "software issues" so i will go ahead and buy it. With the errors on both, which boards do you recommend i swap over??

[tom66]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

The A board -- the one with the video inputs (HDMI, etc.)
BUT, before doing this! Make a note of the blink code so you can be sure you will not damage new board.

[tw2005]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

something to consider also with these and this is after looking at the flow chart.

Panasonic_TH-P50ST30H_TH-P50U30H_TH-P42ST30H_TH-P50VT30H_TH-P65VT30H_TH-P46U30H_TH-P42U30H_TH-P46ST30H_Training_Guide_[TM]

If it appears to power on and solid green LED, it could be A,SN,SS or P. The key is whether the onboard status LED on the SS/SN is lit or not. If I'm reading it right.

At this price, hard to lose. Hell, you may even be lucky enough and salvage both.

[Steve323f]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

The A board -- the one with the video inputs (HDMI, etc.)
BUT, before doing this! Make a note of the blink code so you can be sure you will not damage new board.

Blink code? What would that be in lamens??

EDIT: Is that how many times the TV blinks when it is switched on? If thats the case it stays solid green on both TV's.

[tom66]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

If a fault occurs, the power light will blink a number of times then pause, typically in red. This tells you the part which is triggering the fault (which is not always the cause though.) Also take into account what tw2005 says.

[Steve323f]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

something to consider also with these and this is after looking at the flow chart.

Panasonic_TH-P50ST30H_TH-P50U30H_TH-P42ST30H_TH-P50VT30H_TH-P65VT30H_TH-P46U30H_TH-P42U30H_TH-P46ST30H_Training_Guide_[TM]

If it appears to power on and solid green LED, it could be A,SN,SS or P. The key is whether the onboard status LED on the SS/SN is lit or not. If I'm reading it right.

At this price, hard to lose. Hell, you may even be lucky enough and salvage both.

Hmmmm so is it maybe worth switching it on with the back off and finding out which LED is not illuminated on both TV's? I fully understand that i should not touch anything on the back at all when it is on and for a while after it has been disconnected also.

[tw2005]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Fyi

varies from region, we have green and red LED indications, and I suspect UK is same but I think the US have only red , so the information in the guides can vary. I have not laid hands on a 2011 series but we see quite a few posts on locked solid LED with shorted SC/Sn boards.

so solid green could be same situation. when you get the Tv we'll know more.

[tw2005]

Re: Panasonic Tx-P42U30B Vertical Multicoloured Lines

Hmmmm so is it maybe worth switching it on with the back off and finding out which LED is not illuminated on both TV's? I fully understand that i should not touch anything on the back at all when it is on and for a while after it has been disconnected also.

I think you'll find yours will have the onboard leds lit, it's the donor that has me curious.