Domain: technology (Hardware Troubleshooting and Maintenance)
Problem: I'm dealing with a nightmare hardware issue after the original SB2209 toolhead board on my Voron printer exploded due to a shorted pin months ago. I recently replaced it with a brand new board and transferred all the peripheral wiring, including the Cartographer probe and fans, exactly as they were (shown in Fig 1). Initially, the Octopus mainboard is recognized via lsusb as an STM32 device (Fig 2), but whenever I attempt to flash the firmware using the settings in Fig 3 or reboot the machine, the board completely disappears from the USB list and the onboard LEDs dim significantly or even flicker out. Given that the wiring remains identical and the toolhead board is new, I'm worried that the original short circuit might have fried my Octopus mainboard as well. Should I go ahead and order a new mainboard, or is there a critical error in my software configuration that I'm overlooking?
Answer: Do not buy a new motherboard. Disconnect the Cartographer probe and re-test.