OK Braiin OS installed to NAND. ( Using 16GB card, with 8GB there was an error "firmware.tar.gz" is missing )
Seems that the missing hashboard appeared and hashing.
However in Braiin OS there is no temperature measurement!

and after a while 2 hashing boards stop hashing
Thu Jul 25 19:59:11 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:11.130] Accepted 06cba9a4 Diff 9.64K/4327 BC5 0
Thu Jul 25 19:59:11 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:11.522] sensors: 7/0 temperature read failed, using previous
Thu Jul 25 19:59:11 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:11.522] sensors: 7/0 temperature (0.0,0.0)
Thu Jul 25 19:59:11 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:11.522] sensors: no working sensors
Thu Jul 25 19:59:17 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:17.432] Version submitting share mask 0x00c00000 with work version 0x20c00000 and pool version 0x20000000
Thu Jul 25 19:59:17 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:17.517] Accepted 6dddf4ae Diff 153K/4327 BC5 0
Thu Jul 25 19:59:18 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:18.203] Version submitting share mask 0x00800000 with work version 0x20800000 and pool version 0x20000000
Thu Jul 25 19:59:18 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:18.288] Accepted 0241bc1f Diff 29K/4327 BC5 0
Thu Jul 25 19:59:20 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:20.351] sensors: 5/0 temperature read failed, using previous
Thu Jul 25 19:59:20 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:20.351] sensors: 5/0 temperature (0.0,0.0)
Thu Jul 25 19:59:21 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:21.020] sensors: 6/0 temperature read failed, using previous
Thu Jul 25 19:59:21 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:21.020] sensors: 6/0 temperature (0.0,0.0)
Thu Jul 25 19:59:21 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:21.127] Version submitting share mask 0x00800000 with work version 0x20800000 and pool version 0x20000000
Thu Jul 25 19:59:21 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:21.310] Accepted 0d27c29e Diff 4.98K/4327 BC5 0
Thu Jul 25 19:59:24 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:24.932] sensors: 7/0 temperature read failed, using previous
Thu Jul 25 19:59:24 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:24.932] sensors: 7/0 temperature (0.0,0.0)
Thu Jul 25 19:59:24 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:24.933] sensors: no working sensors
Thu Jul 25 19:59:33 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:33.471] Version submitting share mask 0x00000000 with work version 0x20000000 and pool version 0x20000000
Thu Jul 25 19:59:33 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:33.557] Accepted 020c7705 Diff 32K/4327 BC5 0
Thu Jul 25 19:59:33 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:33.765] sensors: 5/0 temperature read failed, using previous
Thu Jul 25 19:59:33 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:33.765] sensors: 5/0 temperature (0.0,0.0)
Thu Jul 25 19:59:34 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:34.432] sensors: 6/0 temperature read failed, using previous
Thu Jul 25 19:59:34 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:34.432] sensors: 6/0 temperature (0.0,0.0)
Thu Jul 25 19:59:38 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:38.344] sensors: 7/0 temperature read failed, using previous
Thu Jul 25 19:59:38 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:38.344] sensors: 7/0 temperature (0.0,0.0)
Thu Jul 25 19:59:38 2019 daemon.err cgminer[6079]: [2019-07-25 19:59:38.345] sensors: no working sensors
Braiin OS seems very powerful firmware but missing temperatures sensors is very dangerous.
So i tried to install 201711171757 bitmain firmware from official page with no luck
