How to fix hardbricked phone?

[Dannyc52521]

Hello guys, i have a lg g3 d855 phone that won't go past the boot up, it comes up with some sort message saying error 440 boot certification error or something like that, i tried to restore to stock with my laptop, but i can't put it in download/firmware update mode, i hold the volume up down and plug connect it to computer but it dosent go in download mode.. can someone please help?? I installed the drivers for lg but after i installed it comes up with device manager saying it could not find drivers online or something... i have no idea whats happening

 

[Rubeni Alimasi]

Turn off your phone.
Press power + volume down

When you see the LG logo, release

Press power + volume down again

You will see a screen that will asks to put your phone in factory reset.

Press Yes.

This will reset your phone. If you have a Custom Recovery this will boot it and you can reset your phone from there. Hope this helps.

Posted via the Android Central App