Samsung Galaxy Note 4 a sound, notifications and alarms stops working

Question

Good evening. From 1 week ago the phone stops issuing me melody, ws notifications, alarms .. use daily key sound to silence X 6 hours work and again put him active. It is all I do about it but the sound just disappears. On Friday xq I fell asleep and my alarm did not sound and it seemed I should investigate what happens. I've restored my note 4 and without previous adjustments. Now as I have made, so any app can be conditioning strange to me this problem.
The first time it happened to me and was the worst. He stopped ringing, I entered sound settings on my melodies and my song was selected to enter the menu but tone, he had disappeared. I Clike in the rest of melodies and none sounded like in notifications. Do you have any solution for this problem?

Answer 1

The volume buttons do not work or some of them stopped working correctly.
The buttons only respond under pressure?
The buttons have been sunk or are no longer "click" when pressed?

If you have already restored the Mobile, Then and mobile and can be damaged or caused a blow, then I guess that.

Answer 2

He has not stopped working the volume button. It is a note 4 is made on the screen therefore nothing works sunk and ok. The thing about me is that in volume so voice suddenly stop ringing tones melodies all notifications and alarms and when you want the sound to come back or I have q power cycle the device.
Mobile I have since April and the failure does not coincide with the 5.1.1 update lollipop.
Neither it has been hit. It seems a software failure. No I have not solved putting data factory.
Cheers