hashrate one hashboard is 800 g/h and temp is 15

[big.miner]

hi all freind

my antminer s9 machine has problem

one hashboard is low hashrate.

i test all method : rest T hard rest and reboot.

please help me.
this problem isent any page .
please see status page
https://photos.google.com/share/AF1QipNRylFj6j4Rm6RXPeh2T6L1qzGbb3XiglT5dGGwnZvke3cxmjlfANQdXFWSiF9bmg/photo/AF1QipNDrF00ydUWUeNIPmddoCvqvnELwrk-FhFIcQv2?key=QTNZOWtHakhYVWdfaXdXdXZRSmZENy1jeHp3RG93

[tim-bc]

There is some issue preventing some data from being transmitted. You can confirm this by noting the 15C default temperature reading.

If you paste your kernel log here, it will help us to narrow down your issue.

[BitMaxz]

Did you try to replace the hashboard cable or swap the cable to other hashboard? Do this first then make sure the socket is clean before you place the cable. Another possible cause is PSU, it might give low power to one of your hashboard, if you have a multitester you can check the PSU if the given power is 12v, then it's fine if not then your PSU is your problem.

Anyway, you can follow this troubleshooting guide from here Possible problems and solutions for S7, S9 (fixed frequency) & L3+

[big.miner]

Did you try to replace the hashboard cable or swap the cable to other hashboard? Do this first then make sure the socket is clean before you place the cable. Another possible cause is PSU, it might give low power to one of your hashboard, if you have a multitester you can check the PSU if the given power is 12v, then it's fine if not then your PSU is your problem.

Anyway, you can follow this troubleshooting guide from here Possible problems and solutions for S7, S9 (fixed frequency) & L3+

thank you for your answer.
i change cable
I built the PSU cable myself .

https://photos.google.com/share/AF1QipPLAvH0WoQMbtsth3JHAMT0r3R6ioMvP9tbUEAJmOnoP2aUK8SSvos6T9SYt_QU3g/photo/AF1QipNOpEERuaGspxXNS0W7Cr5aJXZXwRy3njLxfbCH?key=TU1xN0RRVlBFcTZMdG9rUGh6S3BQZWJKUXdOcXl3

After your answer, I think the problem with the handheld cable is

I posted a hash board for an amateur repair technician
I wish I would do this test too

[big.miner]

this kernel log is for 3 days ago :
https://photos.google.com/share/AF1QipOD6gEwRzuvP7vjUzvVhoDQvuPv3KjEY_nhrCNmWBY03699BiA7fxbo5nPRd6mvPw/photo/AF1QipNNsra-o3uWbMjddLE9qAu5QAwpCGuUlyP8LfCu?key=bzJ0Yhttps%3A%2F%2Fphotos.google.com%2Fshare%2FAF1QipOD6gEwRzuvP7vjUzvVhoDQvuPv3KjEY_nhrCNmWBY03699BiA7fxbo5nPRd6mvPw%3Fkey%3DbzJ0YUtoQ2ltWnQ3cHhtcjFnVnE0cnhzRnVBZU9nUtoQ2ltWnQ3cHhtcjFnVnE0cnhzRnVBZU9n

and this kernel log is for this time :

https://photos.google.com/share/AF1QipMA-fkzNgA3XQ9Lh7cY0vBhLlbmW25StUDShjUwxSjobU5Wpe7DJcS9U6wAuIm95Q/photo/AF1QipMWAWuLnRDRZb3biXBdole_yzvngQtvcnkAPfTd?key=OE9NM0NxdHl5cWhIMmgtenVYTkVRSkRGRGlaQWlR

https://photos.google.com/share/AF1QipP0SWNR-6RkyWbcdVtCAtD3Wxcd7Nu4rqY2QjyuBfbq-HxcM61buX6QMod5wl_R8A/photo/AF1QipMmzxfnuE8iMVZfd8zVtFrVZ0g5h6kIBWVbQZ6y?key=RXUtVU1SQnZLVUh6SWNrNTZVQlpsc3k4bE9iNU9R

During this time, the hash rate is still low But today temperature is not shown.
It is on the 800 g hash
please help me thank you

https://photos.google.com/share/AF1QipPsNXcJIEKl3yO0JXr0aqY2oeBuc5zp609nI1J8bWhF0sa5gBU7I-ChkEbMpZsooA/photo/AF1QipP5-mWKBRyxyeH7C8jW9fqaFiEOFbsPqQL2K6E3?key=THJKVnM1SjRWbk1GZ0NMNy1iXzVCOTZwM3UzSXRB