Sure fire fix assuming hardware is ok and uboot intact is uboot based recovery, interrupt the boot process and set your computers IP to a static IP of 192.168.1.100. Start a TFTP server on your computer serving antMiner_S320141013.bin and run the following commands on your miner.
tftpboot 0x80000000 antMiner_S320141013.bin
erase 0x9f020000 +0x7c0000
cp.b 0x80000000 0x9f020000 0x7c0000
bootm 0x9f020000
Just put the firmware bin file into the root directory on a tftp server running on 192.168.1.100 subnet mask 255.255.255.0 and execute the above commands from uboot to flash it.
OK, that is new.? Pardon, ex-squeeze me, what? don't understand, sorry.
I have a windows computer, and I have TFTP2.exe, can't get TFTP2 to find S3
Windows says IP is .1.250, which the S3 says is alive.
TFTP2.exe, only does something on .1.100 or .1.1 which while typing TFTPboot, is what the S3 says it's addresses are.
Sorry for my ignorance.