panasonic tx42-p42x20b

[adamp91gvm]

hi i have the above model tv witch has the 10 blinks of death it clicks and then clicks about 3 seconds later i have had a look on this site a man had the same problem he ended up changing the a board . I can not find a a board for this model any where would any other a board work with this set thanks

[vinceroger69]

Re: panasonic tx42-p42x20b

wrong thread sorry

[tw2005]

Re: panasonic tx42-p42x20b

Any pictures of it? is the A-board TNPH0829ME , TXN/A1LWUE?

SOS 10 can be caused by other boards too. The SS board is a common failure on these, can you check SS11 for short cct with a meter?

[tw2005]

Re: panasonic tx42-p42x20b

Shopjimmy

Ebay

FlatTvparts _ for part number confirmation

[adamp91gvm]

Re: panasonic tx42-p42x20b

the board says tnph0829 on it not really clued up on how to test but really willing to learn

[adamp91gvm]

Re: panasonic tx42-p42x20b

thats the board but im in the uk

[tw2005]

Re: panasonic tx42-p42x20b

Is there a white sticker with a barcode, ME TXN/A1LWUE?

[tw2005]

Re: panasonic tx42-p42x20b

thats the board but im in the uk

well I guess it depends on how bad you want an A-board. both will deliver, not cheap which is why I'd try and fault find it a bit.

Do you have a mutlimeter?

[adamp91gvm]

Re: panasonic tx42-p42x20b

only white stickers say eng37f03kf and a smallone saying me-tp3

[adamp91gvm]

Re: panasonic tx42-p42x20b

i can get a multimeter tomorrow but dont know where to test it ? thanks for your help

[adamp91gvm]

Re: panasonic tx42-p42x20b

this is the page was reading on here
https://www.badcaps.net/forum/showthread.php?t=26584

[tw2005]

Re: panasonic tx42-p42x20b

only white stickers say eng37f03kf and a smallone saying me-tp3

must be labelled different to the UK flat TV picture but the ME-TP3 could be the clue as the rev I was expecting was ME.

They can have white stickers with the number or a 2 letter suffix stamped on the PCB or a table printed into the board listing all the suffixes and some jumpers which indicate what suffix it is.

We have 3 sources listing an A for this model as the same including 1 UK source so it should be correct or upload some hi res shots of it top and bottom using advanced, manage attachments , max res is 2000 x 2000.

Anyway do yo have a meter to check anything?

i have the Aussie model TH-P42X20A, pretty much the same, the A board can cause SOS10, I caused mine to do it and it was the cabling was corroded and shorted out the A - SN board ribbom SN20. I fixed it by replacing the 2 buffer Ics on the A talk to the SN and the ribbon also sends 5v to the SN board, so P5v shorted tripped the SOS10 at the A.

I'd be tempted to check for shorted Vsus at either SN2 or SS11 first.

[adamp91gvm]

Re: panasonic tx42-p42x20b

im going to get a multimeter from work tomorrow and give it a go but im not too sure on where im testing as im kind of new to this .i can re build engines no problem but electronics im just learning

[tw2005]

Re: panasonic tx42-p42x20b

this is the page was reading on here
https://www.badcaps.net/forum/showthread.php?t=26584

Sure, i was going to suggest unplugging things, i like to back it up with measurements too.

So several things to try.

Disconnect 3 white ribbons at A, Disconnect SN2 (SN board LHS), SS11(SS rhs) and p35(PSU , feeds the C boards bottom of panel)

Power on.

Reconnect

disconnect SS11, see if SOS10 clears.

reconnect

disconnect SN2, SN3 and Sn20

Let me know the results

edit; don't reconnect straight away due to residual voltages on P2,P11 & P35, let it stand for 5 minutes, should really check with a meter. I've spiked those bottom buffers (c boards but a Samsung) and destroyed the Ics on them which means dead panel, no repair.

[adamp91gvm]

Re: panasonic tx42-p42x20b

Ill try tomorrow after work and let u know thanks for your help u guys

[adamp91gvm]

Re: panasonic tx42-p42x20b

Has anyone ever had transistors go on these ? On the power board

[tw2005]

Re: panasonic tx42-p42x20b

Has anyone ever had transistors go on these ? On the power board

I reckon it would be rare, what's happening?

[adamp91gvm]

Re: panasonic tx42-p42x20b

Just 10 flashing lights I have tried disconnecting different parts of the tv still it just stays at 10 flashes

[tw2005]

Re: panasonic tx42-p42x20b

So did you try disconnecting those ribbons at the A and isolate power from the SN,SS an C2 board(P35) and still SOS10?

[adamp91gvm]

Re: panasonic tx42-p42x20b

Yer allways 10 flashes no matter what I take out