1. First, download the stock firmware from Probox2 website probox2.com or from here, here or here. (PROBOX2-EX-20140805 firmware version). 3. Launch USB_Burning_Tool, change the language to English. Click 'File' and choose 'Import image', choose the .img file you just download. Click "Start" to start firmware upgrade, it should take around 3-4 mins and please do NOT power off / unplug PROBOX2 EX during firmware upgrade. After finished firmware upgrade, it will auto disconnected. Now you can unplug it and connect to TV again.
For more details please watch the video below.
ADS HERE !!!