Hi Ruben, Welcome, here is all the info you need to update your TV, it is updated with a flash drive
https://www.mundotecnico.info/viewtopic.php?t=88
It is a serious and reliable site 100% they will help you
First of all ask Matin from me, Tobiastv, if updating you solve your problem
If you answer I give you my Like of Luck for what solutions but I hope yours;)
I greet you, Tobias
If you ask a question in the forum, always answer it, the colleagues who answer you spend your time and knowledge with the will to help you, if you are grateful, choose the best answer and give a Like to those who participated.
Thank you for collaborating in the forum and Success with your repair