925 is paired but has no sound

SOURCE: plantronics discovery 925 will not stay on after a full charge

I'm having this same exact problem man!!

SOURCE: 925 Plantronics will not pair with cell phone.

You are holding down the main button too long.  When it flashes blue and red it is now in pairing mode.  To turn on the headset hold down the main button until you see the blue light come on, then let go.  If you hold it any longer this is when it goes into pairing mode.

SOURCE: iTunes or sound card line in with my USB Plantronics DSP-500 headset

Recently on an HP desktop computer I found setting the device in the Sounds and Audio Device Control panel Voice Tab (and possibly Audio Tab) to reduce the issues with the device ceasing to work. Setting the device from the Sound Icon in the System tray recently only a very temporary fix where the settings reverted to the Sounds and Audio Device Control panel settings in at most minutes. This is at best an I hope it helps solution as I do not know your specific hardware and software configuration we cannot test a solution.

SOURCE: plantronics discovery 925 ps3 pairing problem

When you turn it on do you go to the settings on the ps3 XMB and check to make sure it is connected, if it is connected when you test what it sounds like can you hear yourself? Sometimes your ps3 won't sync to the bluetooth automatically and you have to manually do it in the XMB, go to settings then accessory settings and then bluetooth. Hope this helps.

SOURCE: Plantronics P590 Mic not working

same here..