Hi, I just got my MID 7" aPad and was really happy to use it but when I turn the power button for on/off functions, the button got stucked and I could not lift it up or get it back to its normal position so now, what left here with me is a brand new tablet (still in plastic) but can't be turned on because of its annoying power button. Please let me know how to open the unit. I can't find any screw at its back so I wanna ask how to fix it up. I hope to hear from you ASAP. Please help. Thanks, WriteWorkz