HTC One T-Mobile Soft-Bricked (Can't Fix)

[Fire2910]

Hello,

I got a M7 a year ago and when I did a update which failed, it would show a "red triangle" when I try to boot the phone up. I tried bringing the phone in to the T-Mobile store, they wouldn't fix it, I don't have a warranty on my phone either, so I will not bring it to HTC (that will be a last resort), Also tried wiping cache and data, And even tried to connect my HTC to my Linux PC and a Windows PC, which won't be detected from the PC (have tried using Fastboot/ADB, and on Windows Device Manager the phone won't be shown at all.

Please help!

Also my phone is not rooted or bootloader unlocked.

 

[eyesopen1111]

My first bit of advice is that you should go to XDA-developers.com and seek help there. They are excellent at all things Android and they have a help needed area on their website.