The Amber LED on 5 GHz means there is no client associated/connected to the 5GHz radio which means the radio signal is on, but you have no devices connected (phone, computer so ion).
To solve this issue please check the connection between the ISP router to the Ruckus ICX7150 Switch, because if this connection it's not working you will never get internet connection, just the AP will be powering up, because the Switch will provide power only. The yellow ports must be connected to your AP and your ISP router.
Also please share the image of the switch showing the cable connections.
1. Hard reset the AP using a paper clip to factor default it. Press and hold the FD pinhole for 40 secs.
2. Create a Test SSID
3. Try to connect any client to the SSID.
Note: In case the client doesn't connect to 5GHz, then for testing, disable 2.4 GHz radio on the AP and try to connect to the AP on 5GHz to verify if the client is getting associated and the LED turns Green.
Please try the above mentioned steps to see whether the lights turn green or not.