Hello Kittipong,
I am back to the office today, hope you had a nice weekend,
As my colleague Mohammed mentioned previously, if all APs unable to join WLC, it does not have to be a hardware issue. We can have a WebEx to troubleshoot the issue and figure out the root cause, but please make sure to have access to WLC GUI/CLI and one AP console access.
I am available from 6:00 – 14:00 GMT. Let me know what time would be ok with you,