openCR brush firmware during the development process (DFU way), but after finishing the firmware update, we can not find the port (usb), it can not dfu. And the chip is still hot, how to do. About TURTLEBOT3
Try firmware recovery(https://github.com/ROBOTIS-GIT/OpenCR/wiki/Bootloader#firmware-recovery-mode), and if it doesn't solve the heat issue, I think you should get it repaired.
This proposal simply can not operate
If the MCU of the OpenCR is abnormally hot, please stop using it and repair the board through local dealer/distributor.