When I came home from work last night, there was an electronic burning smell in the room where my 722K is. I have had the 722K for 10 months with no problems and it is acting normal today. There has been no smell since last night. The only other electronics I have in the room are a DVD player and a battery back up (UPS), so I suspect it is the 722K. Is this something I should be immediately concerned about or just wait to see what happens?