[Q] Soft Bricked! One not recognized by computer topic

So long story short my cousin tried to flash the SlimKat ROM the other day and somehow managed to soft brick his phone. Now it gets stuck on the splash screen of "HTC Quietly Brilliant". I thought it would be an easy fix by sideloading a new ROM by adb but that didnt work. I can get it into bootloader (1.44.0000) and fastboot but the real problem is that the computer doesnt recognize the phone at all. I uninstalled and reinstalled all the drivers and have tried 2 different computers and 3 different cables. I can get it to say fastboot usb but whenever I type a fastboot command it gets stuck "waiting for device" and when i type "adb devices" it doesn't find any device.

Has anybody seen this or have a solution?

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