While it was working the first few days, it suddenly stopped and since then it doesn't turn on, not even the light. Has anyone synchronized it to tell me how? Thank you

You don't need to adjust it. As soon as I opened it, it worked immediately! It fits with a 32-inch F&U television. However, it doesn't fit with a 42-inch F&U television.
It works perfectly! I am very satisfied.

It is identical to the original. It worked immediately, recognizing all the functions of the old one without any additional channel programming or other functions of the old one. We simply ended up with a new remote control that worked automatically... And all this for about €5, while for any other compatible one (which would require programming, button switching, etc.) one would likely have to spend a multiple amount.

I received it in 2 days in perfect packaging. As soon as I put batteries in, it immediately paired with the F&U TV