Hello & Welcome to Just Answer,
Sorry I didn't see your question earlier and to hear of any issue you are having with your device.
If you still need help with this, may I ask:
1) What happens if you try to power up the unit WITHOUT it connected to ANY power source? That is, does it power up and stay running for any length of time at all?
2) WHEN did this issue first begin (or was noticed)?
3) HOW LONG have you left the device connected to a charger of some kind?
I see it has been a few days and I haven't seen a response on this page, so I just wanted to follow up to see if you have any more questions concerning this issue OR if the issue was resolved?
I look forward to any further questions or results that you may have.
Thanks, ***** *****--. .-(im)