You mean it does not have any stats show in the dashboard under miner status? No hashrate, no fan, no detected chains, and no pools?
But the logs show normal.

Maybe you have a problem accessing the dashboard and it shows nothing?
Try to access with incognito mode or other browsers if that's the case.

If not work then maybe your miner has a corrupted program and it might need to reflash the firmware to fix this issue.
Try to reflash it with this firmware https://service.bitmain.com/support/download?product=Antminer%20T15

If not work try SD card flashing download the "T15 SD card recovery image.zip" from this link below
- https://service.bitmain.com/support/download?product=Flashing%20SD%20card%20with%20image