The steps for system forced refresh/recovery system are as follows. 1. Please download the forced recovery firmware from the company's official website (www.egreatworld.com), the forced recovery firmware contains the following 4 files: update.zip, fastboot.bin, recovery.img, bootargs.bin Please do not modify the file name, and copy these four files to the root directory of the U-disk of FAT32 disk format. (Very important: the U-disk capacity must be 1GB/2GB/4GB/8GB, don't use 16GB or bigger) 2. Cut off the power supply of this machine, inset the U-disk into the USB2.0 interface of this machine's side (close to the USB3.0 as the below picture), with a slender hard object (something like the clip after expansion) to insert into the RST small round hole, keep holding down the RST key in RST round hole not loosened, plug the machine power supply after holding down the RST button. 3. Keep the posture, release the RST button until the TV screen appears the prompt (the green android small robot animation icon) of being forced refresh/recovery system, the system will automatically complete the forced refresh/recovery system process. 4. Please be patient, after the forced refresh/recovery system is completed, this machine will automatically restart, after restart, the player can be normally put into use. Note Please do not turn off or cut off the power of this machine during the progress of upgrading, otherwise it may cause this machine can't boot. The file name of the forced recovery system is very important, do not modify the file name(including capital and lower-case). If you failed in a check, it is likely that the file has not been downloaded successfully or the file has been corrupted, please download again.