I turned my headset on and now the blue light is on and I cannot turn it off.

1. Charge the headset:Headset is charged via USB cable, the light will be red when charging. When the battery is fully charged (about 2-3 hours), the red light of the headset will turn off automatically or the red light turns blue.
2. Turn on the headset:Press the on / talk button on the headset for about 5 seconds until the blue and red flashes alternately (or blue flashes or the blue lights all the time ), now the headset is ready to be connected to the iPhone.
3. Go to Settings, and tap Bluetooth. Turn on Bluetooth.
iPhone will automatically start searching for Bluetooth devices. Tap the device in the Devices list, then follow the onscreen instructions to connect to it. After matching successfully, the blue light on the headset will flash twice per time.
4. Call: when you finish all the above steps, you are going to talk via the Bluetooth headset. When there is incoming call, press the on / talk button, you can talk with Bluetooth headset, when you want to end the call, press the on / talk button, you can end the call.
5. Turn off the headset: Press the on / talk button for 5 seconds until the red light of the headset flashes quickly for twice, then release the button, the headset will be turned off.

I have the exact same problem with my Motorola H710 Bluetooth Headset. When I charge the headset a green light is displayed. After the charge is complete I unplug the headset and NO light is displayed. I flip open the boom and NO light is displayed. I hold the call button for 10 secs or 10 mins or 10 hours and NO light is displayed. There is suppose to be a blue light displayed to indicate that the headset is ON. Since there is NO light displaying that means the headset is OFF. So my headset DOES NOT TURN ON! I did my research no where online can anyone give a solution. All the above solutions given does not help because the blue light DOES NOT turn on. No user guide or customer service rep or tech support can help that is what I found out. So I guess I will toss my headset in the garbage!

Indicator Lights:
1.Headset Status Headset Indicator Light
2.Powering on Steady blue, then intermittent flashes
(changes to standby mode)
3.Powering off Red appears and goes off
4.Standby Blue intermittent flashes
5.Charging battery Red solid light. Light indicator turns off when
battery is fully charged and headset is off.
6.Low battery Triple red flashes
7.Pairing mode Blue/red alternating flashes
8.Missed call Purple flashes. Press the call control button
to cancel flashing light.
9.Incoming call Triple blue flashes when ringing.
Power on and off:
1.Turn on the headset Press and hold the call control button until the
indicator glows blue. You will hear ascending
tones.
2.Turn off the headset Press and hold the call control button until the
indicator glows red. You will hear descending
tones. When power is off, indicator stays off.
If none of this is helpful then it may be that your battery is dead, if that is the case then you will need to replace the whole headset. The battery's are not replaceable.

Good luck from Headsets Direct!

Well first turn your phone's bluetooth ON Then turn ON your headset.Wait for the indicator light to turn from red to blue. (if it doesn't turn off your headset then turn it back on) Press and hold the Call Control button until the indicator light flashes red and blue. (meaning it's starting to pair) Set your phone to find/add bluetooth device and select your headset from the list found When pairing is successful the indicator light should turn blue and your phone will confirm the pairing.

hope that helps....

The following are detail instructions on how to Pair (sync) a Plantronics Bluetooth Headset to your Bluetooth Cell Phone:

1 - You need to go into the device you wish to pair it and turn the Bluetooth feature first.

2 - Then you need to place the headset in pairing mode so your phone will find it.

Find your model headset in the instructions below. Once the headset is in "Pairing" mode you will then need to follow the instructions in your cell phone or Bluetooth device's user guide on how to go it to your phone and search for the headset & pair it to a Bluetooth headset.

The passkey is 0000 (4 Zeros) except models M1000 and M1500 (see below for their number )

For the Plantronics M3000/M3500 (discontinued):

Pressing and holding down the volume up key and the talk button at the same time. Hold them in together until the indicator light on the headset starts flashing red then green.

For the Plantronics 510 Voyager:



Pressing and holding down the call control button and holding down the volume up at the same time until the indicator light on the headset starts flashing red then blue.



Plantronics Explorer 320,330,340 & 350

Begin with the headset turned off. Press and hold down the silver call control button in for 6-10 seconds. The light will flash blue first. Continue to hold the button down then release the button when the indicator light starts flashing red then blue.



Plantronics 655, 665

Begin with the headset turned off. Press and hold down the silver call control button in for 6-10 seconds. The light will flash blue first. Continue to hold the button down then release the button when the indicator light starts flashing red then blue.





Plantronics Discovery 640, 645, 640e

Begin with the headset turned off. Press and hold down the silver call control button in for 6-10 seconds. The light will flash blue first. Continue to hold the button down then release the button when the indicator light starts flashing red then blue.



Plantronics Pulsar 590/590e & 590A & a Bluetooth device:

Begin with the headset turned off. Press and hold the call control button then power the headset on and when the indicator light flashes red and blue, release the call control button. Once the headset is paired successfully the headset will flash blue.

For the Plantronics Pulsar 590 & 590A & the Universal Adapter: Begin with the headset turned off. Press and hold the call control button. Power the headset on and when the indicator light flashes red and blue, release the call control button. Turn the Universal Adapter on. Press and hold the adapter pairing/connect button for 7-10 seconds. When adapter starts flashing red and blue release the buttons. The headset and adapter will flash blue when paired successfully.

Plantronics Pulsar 260

For the Plantronics Pulsar 260, Begin with pendant powered on.

Press and hold both the mute/play/pause button and the power on/off/pairing button simultaneously. When the
indicator light flashes red and blue, release buttons. While pendant is flashing red and blue, use the phone menu to search for Bluetooth devices and select "260 Plantronics." When prompted for passkey,
enter 0000.


For the Plantronics M2500 (discontinued):

Start with the headset powered on. Press and hold down the call control button while also rotating the multi function dial upward (away from the light) until the indicator light on the headset starts flashing red then green. When prompted for passkey, enter 0000.

For the Plantronics M1000 (discontinued):

Hit and hold the volume/mute switch in until the indication light starts blinking.


For the Plantronics M1500 & A500 adapter (discontinued): Turn the headset on and the adapter off. On the headset push in and hold the mute/volume dial until the indicator light begins to flash. On the adapter press and hold the blue power button for 10 seconds. The light on the adapter will flash once after 3 seconds- continue to hold the power button for another-7 seconds until the light flashes red. If the pairing is successful, the headset will sound a tone and both the headset and adapter lights will turn off.

For both the Plantronics M1000/M1500 (discontinued): If you remove the battery cover from the headset and then remove the battery itself. On the Green PC board itself there will be a letter followed by 4 numbers. These 4 numbers are your personal PIN code.

You can also use the Plantronics Bluetooth Pairing Guide

Plantronics Explorer 320
Indicator lights: Blue Light Flashing.

TheBlue light flashing indicates that your headset is working normally. There is no way to turn it off without turning off your headset.

Headset Status Headset Indicator Light

Powering on: Blue light flashes.

Powering off: Red appears and goes off.

Charging battery: Red solid light.

Low battery Red flashes.

Pairing mode: Blue/red flashes for 120 seconds.

Missed call: Purple flashes. Double press the call control button to cancel.

Ringing: Purple flashes. Briefly press call control button to answer the call. Press call control button for 2 seconds to reject the call.

Here's the link to your user guide:
http://www.retrevo.com/d/df/explorer300series_en.pdf?doc=178a4266e3e80dd257e740b75b59b3ad&ts=1265516774335

If you found this information helpful, please give me a big thumbs up when you rate my answer. Thanks!

Plug the Motorola charger into the end of
the headset.
The blue indicator light turns on when the
battery is charging. It may take up to 1
minute for the light to turn on. When the
headset's battery is fully charged (about 2
hours), the blue indicator light turns off.
1
With the headset power off, press and hold
the Call button for 6 to 10 seconds until the
blue indicator light turns on and remains
steadily lit.
Note: The blue light will flash as you press and hold the Call
button. Continue holding down the Call button until the blue
light is steadily lit.
Note: If you let go of the Call button before the blue light is
on and steady, ensure that your headset is off before trying
again.

Step A - ENSURE HEADSET IS IN PAIRING
MODE
Power on headset by sliding the Call button
towards the microphone to initiate easy
pairing. After a few moments, the indicator
light will be steadily lit in blue to indicate
headset is in pairing mode.
Step B - SET YOUR PHONE TO LOOK FOR
YOUR HEADSET
On your Motorola phone, press (Menu) >
Settings > Connection > Bluetooth Link >
Handsfree > Look for Devices.
The phone lists Bluetooth devices it finds.
Select Motorola H555.
Select OK or Yes to pair your headset with
your phone.
Enter the passkey: 0000
Select OK.
When your headset successfully pairs and
connects with your phone, the indicator light
changes from steadily lit to flashing blue.

Troubleshooting: Make sure that any devices previously pairedwith the headset are turned off. If the indicator
light is not steadily lit in blue, turn off both the
other device and headset, wait 10 seconds,
then turn headset back on. Wait for the indicator
light to become steadily lit in blue, indicating
the headset is now in pairing mode.

User Manual

Start with your headset turned off. Press the talk button on the headset. Hold it until you see the light on the headset begin to rapidly blink red, blue, red, blue, red, blue, etc. Let go, the light should continue to blink red and blue. Go into your phones blue tooth menu and search for the headset. The phone will only find the headset if the headset is in pairing mode (blinking red and blue). The pass key is 0000.

turn the head set off.

Turn on your phone's blue tooth

turn head set back on and proceed to HOLD the button down until your phone discovers it. Then enter the CODE 0-0-0-0.