Hard Brick LeTV x900! I need super help!!!

Hello people! The truth did not know where to put this but if it's wrong because there is no problem and relocated!
I have a x900 LeTV I bought several months ago! Two weeks ago you installed a beta version of android 6.0.1. and I was working fine few days and one night, suddenly he went out and caught no more! Hard has a brick because no load, does not light, does not enter or fasboot recovey mode, any PC with any version of Windows recognizes it and have been for days following guidelines to resuscitate through QPST.2.7.429.msi without but although follow the steps one by one PC with Windows 7 simply does not recognize me! I am in despair and can not think of anything else! Some genius of the community could help me? There is a guide for x800 that is very similar to x900, yet still do not achieve much !!!

Indian version stock EUI 5.5.0.14S ROM of X900 for X800 ( international version) ??

Hi everyone. Very excited that i have received my Letv X800 ( international version ) - ( mentioned CE0560 on the back panel) from Gearbest recently .

To my disappointment the ROM is very buggy with Youtube crashing, No color mode option unable to enable Hifi audio mode no System update app.

I am from India. In India Letv has not released X800 officially, but it has released X900 for which it has been pushing good number of OTA updates. As Indian Version X900 is an international version ( Not the chinese Version) and Runs the same Snapdragon 810 processor with 4gb Ram and 64gb Rom , can i install the recently updated Indian( International) stock Rom of X900 to my X800 ( International or U.S version) ?

differences Between X900 vs X800

1. 21 Mp vs 13 Mp ( primary camera) - where as front camera remain the same ( 4 MP- Ultrapixel camera)
2. Finger Print vs No finger Print
3. 6.33 inch vs 5.5 inch ( screen size)
4. 3400 mah Li-polymer battery vs 3000 mah Li-ion battery

Except these 4 differences mentioned above everything else is same in X900 and X800.

In India as LETV is offering content apps like Live , Levidi and Leeco My account would like to utilize these apps.

Here is the link for Recently Released stock ROM for Indian version X900 ( Le Max)- ( Hope it directly suits all international X900 other than Chinese X900)

Please suggest? Will this be the perfect Stock ROM for X800 - International or US version?