Hi vagos1103gr, I'm also have issues with my Apple TV remote.
My remote just stopped working one day. Didn't get dropped or damaged in anyway!
The volume button still operated my tv so I know that button worked and theirs power but I charged it up anyway.
Holding the Menu & Vol+ or Back & Vol+ do nothing. No LED Flash activity!
Using my iPhone I deleted the remote hoping this would work but it didn't.
Next I tried Resetting the Apple TV it's self. This also didn't work.
What is strange, is if I hold down the Menu button and the Home button it Forces the Apple TV to reboot!
So what's going on here?
Is it the Remote or the Apple TV or Software?
The Apple TV is up to Date and at this time its version 15