Nextar MA71520R Digital Media Player "turn portable battery phone charger" Questions

...portable, AA Battery cell phone chargers in the USB port and I was able to see the player work as it had before. This as convinced me that the rechargeable Lithium-Ion battery may be the culprit of ...

turn on try other USB ports or on another computer if one is available. Make sure you are connecting directly to the computer USB port and not to a USB hub. - If there is nothing showing on the screen