Need some help.

Flashed my S17 NAND with Braiins. Miner fans just throttle, not hashing. Tried flashing back with the software, displays "The uploaded image file does not contain a supported format. Make sure that you choose the generic image format for your platform."

Tried flashing back with SD, and just boots from NAND.

My miner is doing nothing now fans just throttling. Was working fine with stock bBtmain firmware.

Any ideas how to restore?