Hi,
Most cable modems have no login IP like a DSL PPPoE modem....
The dropouts people see are pointed to the router, not the internet link....
If its like my old netgear WG-624T (SuperG ??) router that had serious overheating issues, people did stuff like put external fans on the router and all kinds of mods.... Also, some folks felt the power bricks were flaky causing internal power problems.... Some others even put heat sinks on the chips inside the router....