help in antminer T9+ low hash rate

[EmadShaanam]

hello

My antminer T9+ hashing with lowe power rate

https://imgur.com/a/g14YBXm

the kernallog shows CRC error counter=12164

[HagssFIN]

It seems that you might have two bad condition hash boards.

Do you still have warranty for that T9+?

Make a support ticket at Bitmain website.

[mikeywith]

did this happen after a firmware update or just out of no where?

first 2 things you should always do are

1- reset miner.
2- change/flush firmware.

these are the likely fixes for this issue.

if it fails, then

3- try to reduce the frequency, some boards when over heated and over time tend to only work on certain lower frequency.

4- try another PSU  " very unlikely to be cause"