Samsung WEB410 bluetooth headset won't hold charge anymore

Does the unit still work despite the light not working? If so then the LED probably just burnt out. You cant really fix this withought a working knowledge and tools for sodering. Even still its so tiny and done by machine. If the whole unit doesnt work then it may just be dead. The batteries in BT ear pieces rarely last beyond a year. Holding the power button for ten seconds may reset it similar to a computer.

Charge your headset
Charge the headset's battery fully before using the headset for the first time.
1 Put the headset in the supplied charging case and close the cover.
2 Plug the travel adapter into the case's charging socket.

Put your headset in pairing mode
1 Ensure that the headset is off (see Turn headset on/off below).
2 Press and hold the Multi-Function button until the indicator light turns on in blue (approximately 8 seconds).

Turn on Bluetooth on your phone and pair with headset
1 Set your Bluetooth phone to discover the headset by following your phone's guide.
Typically, the steps involve going to the Settings, Connection, or Bluetooth menu on your phone and then selecting the option to discover Bluetooth devices. Your phone will find the Samsung WEP200
headset.
2 Select Samsung WEP200.
3 When the phone asks if you want to pair with it, confirm by selecting Yes or OK.
4 Enter the headset passkey or PIN, 0000.

Your phone and headset are now paired and ready to make and receive calls.
1 Place the headset over your ear.
2 On your phone, make a call to the number you want.
3 If your phone and headset are successfully paired, you will hear ringing on the headset

After you have successfully paired your phone and headset, you do not need to repeat these initial setup steps each time you use the headset.

To turn the headset on
Press and hold the Multi-Function button for4 seconds until you see 4 blue flashes on the indicator light, then release.You will hear a tone and see the indicator light flashes while the power is on.
To turn the headset off
Press and hold the Multi-Function button for 4 seconds until you see 2 blue flashes on the
indicator light, then release.You will hear series of 2 tones and see the indicator light stops flashing.
http://ars.samsung.com/customer/DownloadAnsTempl?AT_ID=70171&SEQ_NO=2

Yes it is perfectly safe. The easiest way to identify whether a bluetooth set is malfunctioning or unsafe is - HEAT. Normally batteries which are about to die or devices malfunctioning will heat up quickly when you charge it.

So unless you dont feel abnormal heat.. they are perfectly safe. Try to remove the BT earpiece when not needed. Your ear canal needs natural air flow. Blocking it with a prolonged use of a BT device could heat up the ear canal. That's where the problem starts! :-)

hold the power button down untill it starts to flash red then run blu tooth detect

Sounds like you have a bum unit.  Plantronics gives a 1 year warranty with every wireless product, I'd send it back.
Have you made sure that you're turning it on correctly?  You push the call answer button and hold it down for about 3 - 5 seconds before it turns on, until the blue light turns on.  Make sure that you don't hold it longer than that or it will go into pairing mode.

connecting my Samsung WEB410 ear piece to motorola phone. Ear piece has been connected to another phone, so I need to know how to reset it to put it in recieving mode?

JUST HOLD DOWN THE MIDDLE OF THE EAR PIECE FOR EIGHT SECONDS

when searching device bluetooth
press and hold power button down on bluetooth this will sync the bt. up then put in the code 0000 for the pin it asks for

On my blackberry I have to turn bluetooth on. Then on the WEP 200 hold down the button untill you hear a series of beeps. The light should blink every so often once its on. Then go to bluetooth options and search for devices.

On the top of the ear piece, there are two buttons, one is the volume up and down, the other is on/off. Press and hold until you see a blue light on the piece that is the mic.