@SukumarCR700, Your screen capture for the Radio look odd for the 5Ghz: I'd think it should show ON? Like this on the Emulator: Something probably Support could help, but I'd try rebooting the router...

@SukumarCR700, Probably need to contact TP-LINK Support for this, but IS the 5Ghz Radio on?

@SukumarCR700 Some other questions, what mode is it running in, Router or Bridged mode? What IS the device that is having a problem? Make and Model as well as Network Adapter make/model. Can ANY...

@SukumarCR700 Suspect you have SMART CONNECT on? If you do, ONLY one SSID is used, the 2.4Ghz one, but the router determines the Frequency you connect to, 2.4 or 5Ghz. Now you might be on the 5Ghz...

@4FCRam This would be a device issue, assuming the router is putting out the SSID? Did you DO any settings changes? Does your devices see the Router SSID? More details would help, especially the...

badbug2000 wrote how to check the adapter(built-in)? @badbug2000 If on Windows, DEVICE MANAGER.