I have a tablet that neither recovery nor update from sd is working on. I installed a screen calibration app on it, and my kid played around with it and screwed up the touch screen so much that I can only touch icons at the very top of the screen...by pressing almost all the way to the bottom of the screen. I attached a mouse to the tablet and ran the calibration app again, but for some reason, the touch screen doesn't seem to be responding at the very top corners, where the cursor first appears, so I can't recalibrate. Is there a way to reset the touch screen settings without recovery, update, or or using the calibration app? My tablet is pretty much useless if I can't get the screen working properly again, and it doesn't look like installing clockworkmod recovery or the stock recovery is going to work. Can anyone help?