If hooked up to the USB charger - it blinks red as if it is taking a charge. But it will not power on - neither on nor off the charger. There is apparently to way to perform a hard-reset.
SOURCE: iPAQ Not Charging from AC Outlet
If you are not using the original chargers it could be the type of charging cable. Not all cables that fit will charge the device correctly.
SOURCE: S9 headset
I just hooked it up with a usb sync cable to my computer. It was installed and ready to use and the charging light came on. Seems like it is charging as the led went from red to yellow, and it does turn on now. However, it still does not work with the usb cable plugged into a wall charger. If this solution works for others having the same issue kindly post your results.
SOURCE: Plantronics Bluetooth Headset P590
This is a "known issue" that I have raised to Plantronics. Whether they do anything about it, remains to be seen. The workaround I have discovered seems to work with both of my P590 headphones that stopped charging:
1. Plug in the USB charging cable to a laptop or computer that is powered on.
2. Connect the USB charging cable to the headphones
3. Connect the 3.5mm headphone cord cable to the headphone output on the laptop of computer (this is the long cable with the normal 3.5mm stereo plug at each end)
4. Plug the other end of the 3.5mm cable into the P590 input.
The headphones should start charging.
Carlos (New Zealand)
SOURCE: no audio blueparrott B250-XT
turn it off, plug headset (charging), unplug and let it pair with phone problem will be solved
SOURCE: the red light does not come on when I charge the
I have bad news for you, most likely, you have a drop dead battery.
But there is good, it can be replaced, if not afraid of a screwdriver and soldering iron:)
If you disassemble the unit, you'll find the battery if you own a soldering iron it can be easily replaced by the same or even greater capacity.
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