Sennheiser HDR 120 Consumer Headphones "polishing" Questions

Why don't either the charging or on/off lights come on when my transmitter is plugged in? The headphones are turning on just sending static. Bad connections. Plug in and withdraw multiple times, It ...

my bose in ear headphones are broken near the jack how can i repair them You will have to strip back enough wire length on the wires and also on the jack (or a good new and used jack with wires coming

The cable on my Bose earbuds is starting to show use at the plug end. Is there a way to fix that or can one send it to Bose to have them reapir it? Here is a picture of the final repair this is a ...

My guitar is plugged in the input and the out is going into my amp, why can't I get any sound Recorders usually output when in recording or playback mode only.