Lenovo yoga tab 3 x-50M flash

I had flash a wrong Rom (yoga 850M ) in Lenovo x50M via TWRP but after flashing and restarting the screen is not showing anything and it is dark what should I do?

Please upload stock firmware of x50M ,,,,,,,............

from xda-developers http://ift.tt/22x57dS
via IFTTT