hi,
i own Yepo 13.3 ” that seams to be same notebook.
have same issues like you guys, i changed dedicated memory for video and screen stopped working.
I opened notebook and did not manage to find way to clear cmos.
I did find one push button that i tried pushing but it just switch off motherboard, maybe it needs some combination of buttons.
I am waiting for that usb flasher to come and i will try to flash EZbook bios. have nothing to loose as I could not find one for Yepo