Vestel 17MB170 10129490 firmware for Hitachi 55HAK5751 no image

Hello to all, I need help to solve a problem with a TV from a friend. The main board Vestel 17MB170 10129490 TV HITACHI 55HAK5751 it breaks down and he bought a second-hand one that has sound but no image; this mainboard is for a TV of 50" instead of 55". All steps indicate that we can update the correct code (firmware) to this mainboard and the TV will work.

Can anyone help me to get this firmware? I attach the pictures of the mainboard and TV model.



Many thanks in advance, Jose.
Can you write the full sticker/label details from the LCD panel and from both mainboards (original and second hand), not only 17MB170 / 10129490?
Original mainboard TV: HITACHI 55HAK5751. Código Vestel: 10129490. Mainboard: 17MB170. Chassis Vestel Android TV. Panel 55T32-C0L.
Second-hand mainboard TV: HITACHI 50Hxxxxxx. Mainboard: 17MB170.
Have you already tried any USB firmware update, and when the TV is on do you have backlight on the screen or is it completely dark with only sound?
No update tried.

main 17MB170, panel VES550QNDA-2D-N41, tcon AUO T550QVN05 7 ALCW
software link
it's for another brand (Turbox), but it works perfectly on your model

copy the file upgrade_no_tvcertificate.pkg on an empty usb stick
insert the usb stick in the tv
then plug the power cord: the recovery will start automatically

Many thanks for your quick response, I will try to install the Sunday and answer you with the result.