You're blowing which circuit? Your house elecrical circuit to that room, or blowing the fuse in your receiver or what? Unless you have electric heaters or something going on that circuit, this should not at all be the case. Your receiver, tv & cable box shouldn't be so much of a load to trip the breaker. Trouble shoot the setup, try connecting one component to electricity via a different circuit, even if you have to use a long extension cord coming from the kitchen for example, then see if whatever result you have been getting still happens. Either something isn't wired correctly, there's an internal problem with the power supply in one of your components, or you must be running too many electronics off that particular circuit. You can add up the amperage requirements found on the back of each components, see if they add up to less than 15A (this is your circuit is probably rated at).
