KD5 stopped hashing

Greetings, my kd5 was running fine for months now purchased 2nd hand.
this morning check the pool its on and it was offline got into the miner portal and all boards show 0 hash
green shovel pool status normal , green led light on miner flash green as normal, red led fault not on.
i rebooted, powered off for hours , re installed firmware , factory reset, tried everything i know how or could do with no luck still not hashing , any suggestions ? please advise any help is appropriated

Try a different pool

i did try that and still no luck, i also have 2 KD boxes mining in the same pool and they are hashing away no issues. i contacted goldshell but no reply yet, even though its out of warranty.
i am thinking its the control board.

If it’s out of warranty, that’s the first thing I’d do is open it up and make sure all the power screws are tight and the 6 pin feeding the control board are all tight. Wouldn’t be a bad idea to buy a control board from eBay and change that yourself before you ship it off to China for repair for 6-8 weeks.

ru trying to mine the right coin for the miner?