There was a problem with HDX 4002. Integrated keyboard (control) did notrespond to touch.
Has anyone seen this problem?
Never heard of that. Backup your settings and do a factory reset.
If that´s not working, it sounds like a hardware issue.
Then you should talk to your local Polycom Partner.
Mine does that sometimes, all the blue lights are on but the buttons do not respond.
It usually goes away if I remove the mains from the monitor & re-apply.