Stuck in EDL mode locked bootloader any way to flah rom?

[drguild]

Never unlocked or flashed a custom rom on my device since I got it a few years back so its always been on stock.
My phont turned off one night while I was using it aand sicne its been stuck in EDL mode.

Black screen won't boot etc.
Device Manager shows Qualcomm HD-USB QDLoader 9008
I tried diffrent roms and diffrent Mi Flash tools wioth no luck.
In the latest Mi flash I cant flash because of authorisation.
In previous versions I get Waiting for hello packet and Object referance not set to instance of object.
I tried the diffrent firehose files from online.

I am going to try Xiaomi.eu rom and see what happens.
But anyone had this before and can help me get the phone back up and running?

 

[omercicek43]

I had a custom ROM installed. One night I just typed "fastboot oem lock" without giving it much of a thought. Than, of course, the phone was bricked. It wouldn't boot and gave the error "The system was deleted" or something like this and since the bootloader was locked and all MiFlash couldn't flash.
The solution was simple. I just used Mi Unlock and it worked. The bootloader was unlocked again. I didn't think it would work.