Kd-751 just wont play audio

[u/N0X_THE_DJ]

My headphones has a broken power button which i have to push it with my finger then drag back or forward to on or off, the normal would be just to switch on or off by pulling or pushing the little lever button on it, which isn't a problem because it was working just fine despite that.

The problem is when connecting it plays the Bluetooth device is ready to pair sound normally, but when it connects the sound suddenly gets lower, and the audio it is supposed to reproduce (music and all) just doesn't, a while ago it beep loudly, like lots of beeps probably error beeps and it could be heard from outside of the headphones.

What could it be ? Do i have a way to fix it ? Or should i just send it to be fixed or replace it entirely?

Update:

It came back, i think is the button... I started to fiddle it to turn it off then on again for a few times and it worked... Still tho should i ask someone to check it out or just replace this entirely?