sorry but it's probably seriously ill and will need to be shipped off to the xbox hospital in Frankfurt. Try turning it off at the mains and leaving it off for a while, then turning it on again, but to be honest, normally when you get the ring of death it will have to be mended. We got the ring of death once, and a re-boot was all it needed, but the second time it happened the motherboard inside had failed and we had to send it away. They say it normally takes a fortnight. My friend's took less than a week to go there, be fixed and come back, but ours took ten days and my boss' took almost a month!