I had purchased the Sylvania 10 inch tablet with Android 2.3 built in. All of a sudden the Tablet is not booting up at all. It switches on and the Green colored text "Android" is displayed followed by the Orange "Sylvania". Then it hangs forever. Usually the Sylvania logo will animate for a while and the device will be ready in a minute. I removed the SD card and tried with no luck. Please help. TIA.