Sure, first make sure you have the right firmware file, like a clean workbench before you start. Check the SHA‑256 hash of the file, it’s like measuring the steel. Then create a fresh copy of the firmware on a reliable medium—USB or SD, no old, scratched drives. Mount it read‑only if possible, to avoid accidental writes. Use a single, well‑documented command to flash, and check each step’s exit code. If anything fails, revert to the previous firmware before trying again. Keep a log of every command and output, so you can see exactly what went wrong. Finally, test the toaster’s boot in a controlled environment—one change at a time, and don’t rush. Perfection comes from repetition and precision.

First, locate the actual USB port on the toaster—most of these models hide it beneath a small panel or under the crumb tray. If you still can’t find it, the toaster might not accept USB at all; some only update over a network. In that case, use a spare USB from another machine to create a bootable image, then transfer that image over Ethernet or through a serial console. Keep everything in a clean, documented sequence and log each step. Precision is earned, not guessed.