Plantronics Legend headset stopped working. It seems to charge ok and when I push the buttons the blue light flashes yet nothing happens. It was working well a couple of hours before this occurred.

SOURCE: plantronics voyager 510 headset

Make sure the headpiece is charged. Turn the headpiece off by pressing the little black button on top of the earpiece and holding for about 5 seconds. Turn the earpiece back on again the same way. You should have a slow flashing blue light on the mic boom. The base station will now try to find the earpiece and within about 20 seconds the red light on the base should be steady and blue light on top should be on.
If this doesn't work you may need to manually pair the earpiece to the base by pressing and holding the Listen Volume Adjust + Button and headset Call Control Button on the earpiece until the light on the mic boom flashes red and blue repeatedly. As above, the base station will now try to find the earpiece and within about 20 seconds the red light on the base should be steady and blue light on top should be on.

SOURCE: I am getting feedback with Plantronics CS70 Wireless Headset

Echo is usually caused by the transmit (speak) level on the unit being set too high.

1. First, try lowering the volume of the telephone. If you still hear an echo, adjust the volume of the headset itself.

2. The master transmit controls of the headset are the ABCD switch settings on the bottom of the base. A is the lowest and D is the highest setting.

3. You can fine tune this setting with the plus (+) and minus (-) buttons on the back of the charging base.

4. If this doesn't fix the echo, try moving the configuration dial on the left side of the charging base. The recommended setting for most phones is 1.

SOURCE: Plantronics CS55/HL10 Wireless Office Headset System with Lifter won't lift headset

You may need to re-subscribe the headset.

NOTE: Before re-subscribing the system make sure the IntelliStand switch (on the right side of the charging base) is in the "_" position and NOT the "=" position.

To Re-Subscribe:

The headset and the base unit are supplied subscribed to each other. However, if you wish to use a replacement headset with the base unit (or if you lose your connection to the base unit), then you must re-subscribe as follows:

1. Return the headset to the charging base.

2. Press and hold both the + and - buttons on the back of the charging base until the red light on the front of the base starts to flash.

3. Let go of both buttons. The red light should continue to flash.

4. Press the mute switch (black wheel on the top of the headset) straight down until a green light appears on the headset, then let go of the wheel, and the light should remain on the headset.

5. Resubscription is finished when the red light on the base is fully illuminated and the green light on the headset disappears.

6. Remove the headset from the charging base lift telephone handset/press headset button if not using a handset lifter. The headset and base should now be connected.

7. If this procedure does not resolve your issue to try a system reset.

SOURCE: I need a manual for a plantronics explorer 233

Here is a link that might help you... Manuals
If you are unable to find it there let me know and I will upload the manual.

SOURCE: My plantronics explorer 230 wont work

i had a similar problem. i think you need to know how to put your headset into pairing mode. thats all. puting your device on with the blue light flashing is different from puting it on pairing mode. i have a plantronics 330. and to put it on pairing mode i had to start with the divice off. then press the button and hold it untill the blue light flashes. then keep holding it until the blue and the red light flashes one after the other. then leave it. at that point the headset is on pairing mode. from there you can find it on your phone. but you're going to need a pass code though.most devices work with 0000 (4 zeros) or 1111 (4 ones). i didnt know mine and it worked with 0000. good luck!