I have a Vigor 2800 VG which has been working with wireless. I accidentally reset it to factory settings when I rebooted it to try a clear a VIOP problem. Since it was reset it fails to show any options for wireless LAN in the GUI. I have since performed a hard reset to factory settings and also performed a firmware reset using firmware that I had previously installed. In both cases, wireless LAN options in the GUI fail to reappear. Has anyone any idea on how to reset the wireless LAN?

Open it up and re-seat the wireless card inside the router.