mi tv bootloader blackscreen

[Yemhil]

please guys i need help, i rebooted my android tv mi tv 4a 43ich chinesse version to bootloader and ever since am stuck with black screen

have tried all remote and power recycle method no one work, even go a usb keyboard no avail

whenever i plug my Usb A to usb A my laptop all i get is unknown device for few seconds and it then disappear

please i need help