hi,LYNDEL
Thank you for giving me important information.
I used V7.3.3-1.4.5 updater to proceed with the procedure, but I will lock it in step b.
The running firmware version of the Tsu9300 is 7.0.18.

This Tsu9300 was recently obtained at an auction.
I can't use the rotation key, so I want to update the firmware.

I don't live in an English-speaking country, so I'm translating and posting by computer.
I'm sorry for the difficult explanation.
I need help in this place because I can't get the official support of Philips.

Thank you for your continued support.