I have an Asus TF300T and have had it for 6 months now. It has worked flawlessly. I have lost the USB cable and AC adapter that came with it. I bought another 6' cable from Amazon and plugged it into my computer. My computer recognizes the tablet. However, when I plug the same usb cable into a proven AC/USB plug and plugged it into the wall, the TF300T activates, but it does not show the little lightning bolt that tells me it is charging. I go into the battery program and it says it is not charging. Ideas? Note: I have not dropped or damaged this unit. It was charging perfectly when I had the original cable and ac adapter. Here is an interest thing. I just plugged the TF300T into the keyboard I bought for it and plugged the USB cable into the keyboard. The widget shows that the TF300T is charging, but the keyboard is not. Ideas?