Just purchased a MID N740-W Android 4.0 tablet (N740.Ver.4.0-512/8G), worked fine for just over an hour then froze. When I restarted the device, it hangs on the ICS start-up screen & stays like that until the battery depletes. Tried all known reset options, nothing works. Any ideas from anyone? The 7" tablet has both a memory card slot & mini-USB port. Any guidance would be greatly appreciated.