Recovery of Hislicon based android devices is pretty much tricky as it is both simple & difficult at the same time .There is no exact known method of forced recovery like Amlogic except to remove the emmc from main board & erase/write it by Programmers However the simple method is to use Hitool program .it helps to erase the flash & write it again the step taken are as follows 1. Download Hitool program & install on your PC please install Java(Ver 1.8), then you can execute this 2. Now open Hitool 3.Select HiBurn , you have to select Device ID to erase EMMC.. Select Hi3798CV200.(if your processor is Hi3798Cv200 otherwise select your relevant device ID ) 4.After select Hi3798CV200, then you will see below picture, 5. Now, ready to erase EMMC. 6. Connect RS232 cable to PC to your Box ( you have to look if your Box supports RS232) 7. If you have connect RS232 cable to PC to Box then it is ready to erase EMMC 8 . Carefully select if you want to “Erase” just Partition or Erase All ..I recommend to use the first option “Erase” if it doesn’t work then use Erase All” Before pressing "Erase All" button, please check that you select "Burn EMMC" 9. Turn on Box power Then you will see the message press OK to erase Emmc. It will Erase the Emmc .Initialization window will appear 10. Now Copy the recovery Image files you have downloaded for you box to USB stick .In most cases you can find 4 files. Recommend to format your USB Stick with FAT32. 11. Insert USB stick to Front USB 2.0 port and turn AC power ON, then you will see "uPdt" message on Front panel It means that box is updating with firmware. It will takes over 3 minutes for all procedures.