Basically you have a 1.6B that don't like 3.01 Bios's
Banks 1-4 v3.01
Banks 5-8 v3.03
Backup v3.01
So if you try to boot to your back up you wont see nothing, ENSURE you put the correct bios on X3 3294 v16plus.bin is for v1.6/v1.6b Xbox Versions.
Take a look at a link in DJBOOBYS sig (busted Chain) I think, it will explain on how to flash the back up OR you can flash X3 3293v16plus to your other bank via FTP, its real easy, boot into x3CL FTP to your XBOX, go to the ADMIN folder, locate your 1 meg bank folder, select your bank to flash 1234, change your switches, turn off the flash protect and drop the bin file into the folder, it will auto flash.