It seems that the temp sensor is reading abnormal or it is broken.
Have you tried to flash it? If not then try it first then try to test the hashboard one by one
Also, a little bit of research here on the forum will bring you here
https://bitcointalk.org/index.php?topic=5244120.0Reading that would help you to get rid of the sensor problem.
I've been searching online but can't seem to find the recovery firmware to use the SD card with. But I found the normal S17 firmware I can install.
Where do you find the recovery firmware for the SD card?