LG G4 - Secure Booting Error! Error Code : 1014 - BootLoop - No enter DownloadMode

I tried to install a ROM Custom on my LG G4 and it brick, and it is in the loop logo and and is loop in download mode also and when I connect my phone to pc the computer does not recognize the phone , it's like I do not estivese connected in computer already installed mobile drives 10 times old and new version , and the phone does not enter the dowload mode and not in recovery and also does not turn on and the PC can not recognize my lg g4 , I tried to change pc cable and anything,

Mobile : LG G4
Model: H815P
Made in Brazil
Error:

Code:

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Secure Booting Error!
Error Code : 1014
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