I just installed the Terk 5x8 Multiswitch with the DC power adapter. I have a Direct TV triple sat with seven receivers coming off of the multiswitch. (Two for the Tivo.) Question-When I went down about three hours after it was plugged in and hooked up, it felt hot to touch. Not the DC adapter, but the board itself. Is this normal? Also, how long do these things last? Won't it just slowly burn out?