I have new headsets, SHB9100 and they worked fine for one day but now they only work with 3,5mm cord.
When they are connected for loading there is the white blinking light.
When no cord it's black. No lights at all. doesnt respond to anything.

It is NOT the battery since they actually work with the cord.

Any ideas???

Ps. This is the second pair I own so I know how to use it.