be careful, my "tutor" only fixes the problem of the lost pic, in the log of the kernel there must be this after having checked the fan:
chain [1] PIC jump to app
Check chain [1] PIC fw version = 0x03 (or other)
but if you have:
chain [1] PIC jump to app
Check chain [1] PIC fw version = 0x00 or 0xff
so my tutorial will be useful!
Also beware, my HEX file is ONLY for the T9+ ! it is equipped with a PIC32 while all other antminer are equipped with PIC16 !!!
We have tested this with some users before, but it does not seem to work for everyone. I'm glad it worked for you

You said that it did not work for many others, which model? what process? have you program the pic?
Thank you
