Is it a managed switch? If yes, could you login into it and check if connected port is learning the AP MAC address?
To understand the AP power up and LED status, refer below:
Red: AP is starting up
Flashing Green: No routable IP received (from DHCP server) or assigned (manual IP assignment). Indication of potential network/configuration issue.
If configured for DHCP and the issue persists, check VLAN configuration and status of DHCP server.Solid Green
: A routable IP has been assigned to the AP
If you dont have a DHCP network, try accessing AP by connecting a laptop to APs second eth port and configure 192.168.0.x IP with subnet 255.255.255.0 and then try to access AP on its default IP 192.168.0.1
If power LED is solid green or flashing green then check the network part (DHCP server and VLAN configuration on switch port side).
Since AP is powering up, it could also be a faulty cable or faulty switch or AP port. To confirm, start by isolating in below sequence.
1- Use a already verified cable which is working fine with any other device.
2- Use a already verified switch port where other device works fine.
3- If still you are not able to access the AP, try powering up AP using power adaptor or POE injector and connect a laptop directly to AP's Eth port.
Syamantak Omer | Community moderator | Staff TSE | CWNA | CCNA | RASZA | RICXI | Follow me at https://linkedin.com/in/syamantak-omer-5949b6124