I've got an S5 with one good board and one that's dead, but... NO fan, I used it for another project because...  The temp sensor doesn't work on the good board, just shows '0'.  Still hashes fine, just haven't been running it because the software doesn't adjust the fan speed when the temp is "0" and I didn't want to risk it running hot.

The dead board *might* have good chips, might not.  I bought the S5 quite a while back as "half-hashing".  The power connections on the dead board had de-soldered so it never ran for me.

Can send pics.  PM or post if interested, ships from US.