If the screen stays black, you haven't bricked your card. You simply panic, flip the switch back to "Primary" (the working backup), boot up, and try again. This "safety dance" elevated ATIFlash 2.93 from a utility to a rite of passage. It taught a generation of gamers that hardware is resilient if you know the backdoors.
: Move the new BIOS .rom file you intend to flash into the same C:\atiflash folder. For simplicity, rename it to something short (e.g., new.rom ). atiflash 293 install
Many security programs flag ATIFlash as a "false positive" because it interacts directly with hardware drivers. If the screen stays black, you haven't bricked your card