Panasonic tv Tx-55ax630b bootloop

[nervero]

Hi ,
I have tv with main board tnph1112 with bootloop colors white red blue green then black and again wrgb.
After hours trying pushing many combinations of buttons on tv and remote I can't get off this kind of test menu.
I've seen many same issues on yt and no one of the solutions with pushing buttons works by me.
Can it be some eeprom fault or software?
Other main board buyed from eBay and still same.
Voltage on psu is good and I didn't found any of bad or shorted caps on screen flex and screen board , also no defective cof around screen .
When one of flex from Tcon is out then I get some kind of bad picture 1sec with stripes and then goes to black and wrgb loop again .


Any ideas what can it be? Where should I begin to check ?

[nomoresonys]

Re: Panasonic tv Tx-55ax630b bootloop

Probably needs firmware update, try it with a flashdrive, try put in flashdrive with the update then plug in tv, power on, see if it does it automatically. Might not be able to update without a display, one tutorial says turn tv on then insert flashdrive, try one then the other.

[nomoresonys]

Re: Panasonic tv Tx-55ax630b bootloop

https://av.jpn.support.panasonic.com...uk_cis_06.html

[budwich]

Re: Panasonic tv Tx-55ax630b bootloop

Quote: "When one of flex from Tcon is out then I get some kind of bad picture 1sec with stripes and then goes to black and wrgb loop again ".
Does this happen the same with either cable or just a particular side. further, does the disconnected side go white? Look closely at the the connectors on the boards to see if there is some "stuff" in them. Also check the connectors at the panel edge board side.

[nervero]

Re: Panasonic tv Tx-55ax630b bootloop

Can’t start firmware update and I’ve checked connector already with usb microscope for “dirt and stuff” also cleaned every contact points with isopropyl and still nothing ,

[Diah]

Re: Panasonic tv Tx-55ax630b bootloop

Can't start firmware update and I've checked connector already with usb microscope for “dirt and stuff” also cleaned every contact points with isopropyl and still nothing ,

disconnect the both ribbon cable from T-CON to Panel and turn on... it stay on or not ??

[nervero]

Re: Panasonic tv Tx-55ax630b bootloop

It stays still on but only with blank screen and backlight but no restarts

[Diah]

Re: Panasonic tv Tx-55ax630b bootloop

It stays still on but only with blank screen and backlight but no restarts

first of ll take out both ribbon cable and inspect the end of them with a good magnifier

[nomoresonys]

Re: Panasonic tv Tx-55ax630b bootloop

This may be a match, usually need to match up the numbers on the white sticker: https://www.ebay.co.uk/itm/PANASONIC...oAAOSws~pb1u85

[nervero]

Re: Panasonic tv Tx-55ax630b bootloop

first of ll take out both ribbon cable and inspect the end of them with a good magnifier

I've did it already and other visual inspection before my 1st post.
I have also tried other ribbon and tcon flex from other with same pins and nothing changed.

Does anybody have eeprom dump from this board ?
I can't find it on many sites