said by bluepoint:
I have check all cables and splitters and I'm sure there is no loose, cracked cables in my house. Checked the outside connections and they are tightly connected to the splitters. One thing though these splitters outside are exposed to the elements. Don't TWC should be shielding them?
If they're decent splitters they'll last 10 or more years unless they're sitting in water constantly.
As far as your problems, call TWC. Let them know about the wide upstream range. It could be something in the distribution system all the way back to the node, since that is also all coax with lots of connectors.--
If it's important, back it up... twice. Even 99.999% availability isn't enough sometimes.