panasonic tx42-p42x20b

[adamp91gvm]

Re: panasonic tx42-p42x20b

best i can do i did have a brill cam but i sold it to get another but never did i do underground exploring and used it for light painting in the pitch black

[tom66]

Re: panasonic tx42-p42x20b

Hard to tell - will just have to wait and see, I guess.

[adamp91gvm]

Re: panasonic tx42-p42x20b

yer sure it will fit

[adamp91gvm]

Re: panasonic tx42-p42x20b

I have got another one of these models now and I have 1 blink only green flashes then one red flash im getting all of my voltages I should be off the powerboard and to the sc and ss also to the a board any ideas ?

[adamp91gvm]

Re: panasonic tx42-p42x20b

anyone got any ideas on this I have disconnected everything I can from the av board so its just that and the power board and still just got 1 blink it suggests the av I know but im getting all the 15.6v and the 3.3 voltages ? anyone any ideas

[tw2005]

Re: panasonic tx42-p42x20b

anyone got any ideas on this I have disconnected everything I can from the av board so its just that and the power board and still just got 1 blink it suggests the av I know but im getting all the 15.6v and the 3.3 voltages ? anyone any ideas

you've kinda answered your question, 1 blink is A board , can be caused by bad eeproms , could be main processor, could be something else?? I don't know of a way to go any further with it.

[adamp91gvm]

Re: panasonic tx42-p42x20b

Is there any way of testing the eprom or doing a hard reset ?

[tom66]

Re: panasonic tx42-p42x20b

Without knowing what it should contain... no, and to your second question, probably no (without user menu access)
What's the part # on the main board? TNPH......

[adamp91gvm]

Re: panasonic tx42-p42x20b

Tnhp0829

[tom66]

Re: panasonic tx42-p42x20b

Hard board to get. You can possibly try getting a 37"/50" board and swapping over flash chip (104 pin SMD part but all leads exposed so not too hard) from 42" board, this would convert the board into a different type. I believe tw has tried this with success.

[tw2005]

Re: panasonic tx42-p42x20b

I've done exactly what TOM has suggested, you can search my profile and look at threads started, exact same series X20A.

But there are some traps. I'm a little confused by Tom's 104 pin SMD remark.

below are the eeprom / flash ic. if you wanted to take a gamble and a complete stab, ic9304 is the PD4 / panel data. It was that one on mine that triggered the 1 blink.

You need to keep in mind that if you did try the eeprom swap and convert , if it turns out to be a bad flash and it is that IC9304 or IC1100 then you will transfer the fault across to the other board.

If you have another a board from around that era of any type and you swapped IC9304 for a quick test(no need to have the panel running) and it cleared the SOS 1 then you could simply order an OEM chip pre-flashed and fix the board quite cheap

Good news is only 2 ICs need swapping and both easy 8pin. I did all 4 but I did not have the knowledge back then and I used a different market board which created a little more work.
42"
IC1100 TVRR539
IC8921 TVRR431
IC8950 TVRR511
IC9304 TVRR577

50"
IC1100 TVRR540
IC8921 TVRR431
IC8950 TVRR511
IC9304 TVRR578

37"

I can't find manual

[tom66]

Re: panasonic tx42-p42x20b

I was thinking of the orange Hynix IC, so I guess you do not need to swap that (it's main application code rather than bootloader.)

[tw2005]

Re: panasonic tx42-p42x20b

I was thinking of the orange Hynix IC, so I guess you do not need to swap that (it's main application code rather than bootloader.)

Yeah, i thought that may have been the one, i went looking for a 104pin. I'm going to say that must be as you say the main app or GUI I guess, menus etc. I did that one and later realised I may have got away with not swapping which would have made it a lot easier. I've also discovered it's the number that's important not so much the suffix letters after eg TVRR431xx.

I've seen quite often researching US models that a later suffix ends up being a direct sub with the earlier version superceded. maybe that's the one that gets flashed when they have a firmware upgrade hence the revision change, but I am guessing

P.S. that one I did is still running, has a great picture and the son's PS3 looks pretty good on it. the most expensive panasonic fix of all I've done, but I'm pretty proud of that one with all the experimental A board stuff, that Hynix IC, I honestly thought i was going to stuff the board up