Xiaomi M2S doesn't boot (hardware problem)

Nov 4, 2014
A coupe of weeks ago, my Xiaomi M2s fall plain in the screen zone. Since then, it doesn't boot, no matter what I do.

Description: If I connect the phone to the charger without battery, it turns on the red led for a couple of seconds (Continuosly, not flicking) , and then it turns off. With battery, the Xiaomi doesn't even do anything. No led, no boot, nothing. All of this while the screen is black.

I thought that the screen was the problem, so I bought an unofficial one, but after changing pieces, the problem is still there.

What could be the problem with those symptoms? Ty all for replying.

I will upload a video of the problem later
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