@zing I'm not offended at all!! I have to thanks everyone who is trying to help me.
Well, I've tried a fresh reinstall and it's all the same (big menu and no sound):

Then I put again in CEA 1 (or 2) HDMI and the default "global.videomode".
But now I've tried to plug a headphone on my raspberry and I can hear the music and sounds by the headphone but nothing in my TV set. I'm really confused!

@alvin I have a 4k resolution Tv (https://www.lg.com/pt/tv/lg-49UK7550PLA), but anything up to CEA 2 HDMI fits bad on screen.
It make the left bottom corner anchored and grows the image. So I only can see the left bottom menu (much bigger).
I always turn on my TV before the Raspberry and I've tried with another HDMI.

Hi guys! I'm sorry about the topic but I really did a lot of search before posting here. I've updated to Recalbox 8 this week and I had a lot of problems (I'm running with a Raspberry Pi 3B).
First of all I have a really "big menu" screen (don't even fit in my TV screen), no sound and games not working. After searching in web I found the solution for the "big menu". Just changed the "system.es.videomode=CEA 4 HDMI" to "system.es.videomode=CEA 2 HDMI". That worked for me.
After that I've changed the "global.videomode" to default. Now all of my games work fine!
Now, about the sound, I don't know how to fix it. I don't have sound in menu or in games. In Sound Settings I just see "ANALOG OUTPUT" in OUTPUT DEVICE. I've tried to change to HDMI in recalbox.conf but it doesnt worked. Can you guys help me?