I want to recovery control board with SD card.
Can you check the control board model name and post it here and maybe I can find some SD card images that you can use to flash the miner through SD card.
Take note if it still under warranty much better to don't touch it and contact the support to send it back for repair.
Can you try this if you can find the reset hole or button or IP search/Reporter in the front of the miner near ethernet do this below.
- Hold reset/IP reporter/search for 15-20 sec
- Then release
- if you notice that the miner reboot let it run for 5 minutes and check it again if you can find the IP use tools like Angry IP scanner.
If it doesn't work well your final solution is to flash it through SD card.