Exclamation [Q] Defy MB525 does not care and does not light white light

I'm new to the forum. If you are in the wrong area, please forgive me.

I have a problem, my defy not turn on, is not recognized in rsd and white LED does not light when you connect the USB cable or charger.

All this after trying to upgrade to 7 cm. Guess that the battery discharged in the middle of the proceso.

Have any solution??