Hello - if someone get this type of TV Box from ebay (10€ ) - and dont have an GoogleAccount or do not want use the ADB way.
The switch is located in one corner but not soldered. Use a small cable to put GND from end of arrow where the pointing of arrow in picture - to do the reset - (during restart just hold some seconds and device did start from SD-Card -)
This device also features a RX/TX -Console and Jtag Interface - you find it if you take closer look.