I Have the same problem to you. I fix with the next stapes:
The first you need to know is for example, if one headphone is no working (speaker left for example) or wire, the beats doont turn on.
In my case one wire is not establishing conection, (you can check with a tester).
You need to do 3 important stapes:
- The first is connect beats to usb, and check the windows reconize your headphones.
- Check battery status
- Finally with connect usb on pc, press 10 seconds power button, you see your beats disconected to pc. (If not, you have a power button problem)
If this stapes are working good, check your music with and auxiliar cable, and see are listening left and right speaker.
In my Beats on Left case, one wire is not doing your funciont, like this:
This PINS are very sensible and is posible is broken, check the 3 PINS, and normally this is your solution.