hi i have problem with a 9 z master innosilicon
i have a problem with a9 z master 50 kls
just cycle


i have change the firmware but not fix
i change the internet isp
change firmware
i chaange psu but dos not work
my miner connected to nicehash but hash rate is 0.00so
i used
other pools such as flypool and slushpool and nicehash and btc and viabtc and .....
i havent  miner log

please help