Hi i have problem with tv i doubt in firmware i download from sony site then format usb fat32 after that blue light is on and on screen circle doing proces of updating..I wait one hour but same..Maybe some one has firmware back up?

I tried everything but same:(

https://www.sony.com/electronics/suppor ... s/W0011108
Expand [+] and try
"Check the Firmware Version of the TV"
"USB Installation Instructions"
https://www.sony.co.th/en/electronics/s ... s/00011057
https://www.sony.co.th/en/electronics/s ... s/00032065

no at all does not do nothing ..

Are you sure that the electronic components is working properly, for example ESR of capacitors are normal?
Try temporarily like this:

1) Disconnect the TV from the Internet (change the password for wi-fi / pull out the cord)

2) Unplug from the outlet, take out the antenna cable, wait 5 minutes

3) We turn on the TV and the antenna, DO NOT CONNECT TO INTERNET

Only came on screen circle nothing else no menu or etc..I format flash in root i did firmware from oficial site sony ..After turn on light is blue but usb doesnot doing nothing no update ..

Thanks for answer ..I tried all option non of them does not do job..Only on screen circle spining..I test all voltage everything is corect instead five coil there is not votage at all..This is for processor power..

You have service manual and schematic diagram ?

No i could not find..

Is possible program nand flash by ch31a programmer some wire connection? ,I dont have adapter for nand ..Maybe some other option?

NO