USB fell out any other methods to flash bootloader?

My USB port literally fell out, all solder points came undone. is there any other methods to flash the bootloader?

Installing bootloader methods

How do you put the tablet into "download" mode, so you can run Odin, if say the tablet will not boot, or if the bootloader is stock/bad/inaccessible?

Many thanks

Galaxy s3 Nand write fail, softbricked. Can't get normal methods to fix it.

Hello! I have been rooting and flashing roms for a while now, and after sticking with a cm mod for a while i decided it was time for a change. I foolishly didn't back anything up and just flashed a rom to check it out. I have a Galaxy s3 19300 unlocked version (i have it on a plan for cricketwireless). I cannot get odin to work for me to flash a new custom rom, a stock rom, or even begin trying to flash. Odin either gives me the nanad write error or the program stops responding. I have samsung drivers installed and really need some help. I'd appreciate any help on getting me one step closer to a working phone. Thanks!