Here is a 101 Video to help you, manual update or restore your MyGica ATV1900ac.
(( Remember, to follow step by step ))
Things you need:
1. Mini SD card, should be over 512MB ** Mini SD card recommended **
2. A Toothpick ** to place your box under recovery mode **
3. The Factory File: http://bit.ly/1jndGDH
If your interested on buying this product here is a few link: