I've got a Wi-Fi problem that's got me perplexed so I'm throwing it open to the collective mind to see if anyone's got an answer...
The setup is I have a Zyxel access point high on the wall in my hallway which is essentially the centre of the house. This gives me excellent coverage on both 2.4GHz and 5GHz bands throughout the house. Vertically above the access point is my PAs room.
Until the last few weeks the system has been working well. Now one of my PAs can't get a stable Wi-Fi connection in her room on any device, though it seems OK elsewhere in the house - an iPhone, iPad and an Acer laptop. My other PA (iPhone, iPad, Android phone) has no problems, nor does any other device anywhere else in the house. The PA with the issues insists it started failing when I installed 2 indoor wireless CCTV cameras, one in the kitchen/diner about 6m away and one in the hall about 0.5m away from the AP. I've physically powered off the hall camera, thinking maybe it's proximity to the AP was an issue, but that's made no difference. When her windows laptop connects it gets an ip address from the main router/dhcp server but claims no internet. I can see all 3 devices and ping them from the router with sensible ping times.
I've had wireshark running and there's no apparent bandwidth issues, I just can't see any reason why her devices won't connect reliably in her room. The Windows trouble shooter can't resolve the issue.
I'm running out of ideas and being stuck in bed can't physically go and investigate.