After a did a firmware update without no troubles, I want to install other firmware because the accelerometer doesn't work, and so the auto-rotate function (it worked on the old firmware), and I can't get into recovery mode, the home + power function does not work anymore. I want to use USB Burning tool to reflash the tablet, like the last time, but now I have this problem: when I connect the tablet trough USB cable with the power on, windows recognize the mass storage, but when the power is off, which I need for USB Burning tool, it doesn't do anything. It should show in the bottom-right corner that USB device found, but it doesn't. I tried this: 1. to hold home-button and then to insert USB... nothing, it just shows the battery charging 2. to hold home+power button... nothing... doesn't enter in recovery mode, it's just loading android system. 3. SD card slot was empty when I tried this. Does anybody had some king of problems? or know what's the problem? Please, I need to fix this.