Default [Q] HELP WITH USB DRIVER & SOFT BRICKED GS lll T-999

T-Mobile Samsung Galaxy S lll T-999

If the usb driver is not detecting my soft bricked galaxy s3 sgh-t999 but will detect my other galaxy s3 what could this possibly mean?*BRICKED PHONE SYMPTOMS* 1. Won’t go into recovery mode, only download mode.2. When trying to start up it vibrates and stays at “Samsung Galaxy S3 screen and some times it vibrates and stays at “Samsung Galaxy S3 screen and and goes into this mode as if I just wiped the cache & data and was loading with the green android man and just shuts off or repeats the same cycle. Wth is going on I’m lost!!!!!