Panasonic 58-TXAX802B Stuck on Panasonic Logo

[661305]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

I know i'm reviving an old thread here but i'm wondering if the OP Ben198585 has any more info on what they did as i'm in the exact same boat now.

I have the exact same boards and i'm going to frankenstein them!

Physical mods i'm fine with.

I have both service manuals.

regarding pinout mods, you mention main board to power, buttons and ir.

Are the below the mods you made?

* - Main board (A-Board) >>> power board (P-Board)
* - Main board (A-Board) >>> IR receiver (K-Board)
* - Main board (A-Board) >>> Buttons (GK-Board)

[narsil]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

I just downloaded both service manuals, then compaired both power boards and main boards to put correct pin 2 pin.
It does get very confusing lol... As long as you check your wiring 3 time over before you switch it on.
I wired the B/L on to the standby button, and when you turned tv off with remote it didn't turn off the B/L.
So that was the only thing that wasn't perfect!!
but just ment turning it off with the button on the side instead.

Does anyone have a emmc file?
TX-50AX800E
TNPH1100

[Ben198585]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

I just downloaded both service manuals, then compaired both power boards and main boards to put correct pin 2 pin.
It does get very confusing lol... As long as you check your wiring 3 time over before you switch it on.
I wired the B/L on to the standby button, and when you turned tv off with remote it didn't turn off the B/L.
So that was the only thing that wasn't perfect!!
but just ment turning it off with the button on the side instead.

[KarlNecher]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Hi, jumping in on the end of this talk about the poor fast dying model the TX-**AX802.
I have some good news!!!

I picked up a main board from a TX-**Dx902 flagship model off the bay for £40 (not bad compaired to £150)
If one ever turned up on the bay, it would most definitely end up going bad. A Bit like a £150 ticking time bomb lol...

A little bit of modification to back cover with the metal snipped & removal of the 5 aux ports on top of the main board, also add putting correct pin to pin rewiring main to power, main to ir & buttons. This is not plug n play!!! Be warned!!! Also remove original HDMI/backlight control boards.
Stitch up after rewire, zap with 2.6 jigga watts and Frankenstein is alive.

I know it's A bit ghetto but keeps recycling fun

Hi, this is such a great work!
I can't really understand how u wired the backlight between the new main board and the inverter board. Or is there no need for wiring. Could you please explain that to me.

Best Regards

[Davi.p]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Jamjon i thought you had same model same problem and instead nothing, this is not the place for you, open.your own thread please

[Jamjon]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

My 50axw804 is hanging in a boot loop. Sometimes its working (when it passes some point in the boot process) normal unto the next boot. It doesn't show any error code whithin the test mode.

@David: what would be your plan, which debug port you mean?

[zens electronics]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Thanks for the information Davi .

Haven't experimented with this model myself , but was told by another engineer about the pairing thing .

[Davi.p]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Zen i don't think the thing is made so, i guess : in factory it is written the firmware, after it is launched an application from within the tv that reads the CPU registers and initializes the right keys in the right files. The problem with the eprom copying is that it is like two cars turning with same ... sorry i don't know the name.. plate??

[zen]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Hi

Even if you manage to programme up the E M M C chip & get the set working , i suspect there may be issues with the HDMI hand shake , as i believe the chip is paired with the CPU .

Most TV manufacturers have now started to do this , & as of yet , i don't know of anyone that has found a workaround .

[Davi.p]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

The problem is only software for me. there's non need to replace any chip. The point is that it needs to succesfully have access to the system through the debug port and no other strange obstacles prensent , finally needed a good basic knowledge of linux systems. If out there some of you would risk to spend money for sending the board to me, i can try to do the work in the time intervals, i need to be payed for the work anyhow.. The main risk is that there can be a software protection when accessing system..

[Jamjon]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Hi, jumping in on the end of this talk about the poor fast dying model the TX-**AX802.
I have some good news!!!

I picked up a main board from a TX-**Dx902 flagship model off the bay for £40 (not bad compaired to £150)
If one ever turned up on the bay, it would most definitely end up going bad. A Bit like a £150 ticking time bomb lol...

A little bit of modification to back cover with the metal snipped & removal of the 5 aux ports on top of the main board, also add putting correct pin to pin rewiring main to power, main to ir & buttons. This is not plug n play!!! Be warned!!! Also remove original HDMI/backlight control boards.
Stitch up after rewire, zap with 2.6 jigga watts and Frankenstein is alive.

I know it's A bit ghetto but keeps recycling fun

Sounds good, what is the exact description oft the bord you used? You thik it depends in the sitze oft the TV?
Could u show the wiring that you changed?

Regards

[Ben198585]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Thanks my friend

[nomoresonys]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

VERY nice work, it's very cool when someone solves a puzzle like that and everything works fine, as long as no protection was disabled, just did one not long ago, needed a snip here and there and presto. Nice save.

[Ben198585]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Hi, jumping in on the end of this talk about the poor fast dying model the TX-**AX802.
I have some good news!!!

I picked up a main board from a TX-**Dx902 flagship model off the bay for £40 (not bad compaired to £150)
If one ever turned up on the bay, it would most definitely end up going bad. A Bit like a £150 ticking time bomb lol...

A little bit of modification to back cover with the metal snipped & removal of the 5 aux ports on top of the main board, also add putting correct pin to pin rewiring main to power, main to ir & buttons. This is not plug n play!!! Be warned!!! Also remove original HDMI/backlight control boards.
Stitch up after rewire, zap with 2.6 jigga watts and Frankenstein is alive.

I know it's A bit ghetto but keeps recycling fun

[rachido_miss]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

dump for ic1600

[Swen]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

There is no need to upload a new DUMP to the IC1600, but the main problem is in the eMMC IC8903 on the other side of the mainboard.

[cubinarium]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Hi all,

Apologies for the general post, but I have exactly the same problem with the same model (the TX-58AX802). Removing and reflashing seems like an extreme solution but if anyone has any pointers I'd be more than grateful.

I guess if someone could tell me where the firmware image is stored, for example there is a replacement t-con board on ebay which I'd happily fit, but want to be sure that will fix the problem (i.e. where the firmware is stored).

There are three groups of boards (excluding the power on the left), the t-con board seems to be the one at the bottom (as it's the same as the part on ebay), but the other chap here sent a photo of the board on the right (which has all of the external ports connected). The centre seems to be the HDMI control board. If anyone could let me know which board I'd need to replace, or if there's any other way of getting beyond the panasonic logo that would be amazing.

This only just happened, it seems to have automatically updated itself as it had been fine since I had it which was second hand for a little over a week!

*** EDIT! ***

OK - so t-con = timing controller, so would imagine it's unlikely to be that, so the firmware is on a chip on the mainboard presumably. Did anyone manage to reflash it? I'm so surprised, I've seen around 15 of these panels showing the same problem just in my limited research, there's got to be a straightforward way of doing this. WOuld happily pay is anyone could reflash it for me, I'm in Huntingdon\St Neots area.

*** SECOND EDIT!? ***

So based upon what diif and paul said I'd need to reflash the IC1600 (so need to work out how to flash it, and need to find the firmware for it, because the standard panasonic SEC file isn't enough), otherwise I'll need to find a main board replacement!

*** THIRD AND FINAL EDIT!! ***

OK so there's a connector labelled CN1600 which I traced back to the IC1600 chip, presumably so it could be factory flashed.

Is there any way of getting hold of the IC1600 firmware from the above broken link, and would anyone be able to flash it for me for a fee?

***

Thanks guys,

Ross

[OCBSlimz]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Anyone manage to find a dump for this ?

[smpcomms]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Have managed to find a service manual for this model if any good to anyone

Also managed to find a technical guide which covers a few models in the range

[smpcomms]

Re: Panasonic 58-TXAX802B Stuck on Panasonic Logo

Has anybody been able to successfully download this dump file? If so are you able to upload somewhere else or send to me directly

Have managed to find a service manual for this model if any good to anyone