xtrend 8500 stuck on red light

Please seek help for box Xtrend 8500 , boxin I right, the Fīhā and the usb I botloderin new was Mondovia to throw this botloder for a few seconds and it seemed as if the process was completed , and turned off the camera and turn on again , boxi It remains stuck only with red light and leaves no access at all , how to help someone because I do I do not , please help me , salute you .