At some point I found a thread about how to diagnose a flashing red problem, but the search function is practically useless and I figure everyone on here is more valuable anyway. My 360 was working fine for about 6 months, only had 1 time when it flashed red. I let it cool down and it worked fine from then on. Starting in July, more frequently during Oblivion sessions, I started getting lights 1,3,4. I'm pretty sure I discovered this meant hardware/hard drive failure, and tried the technique to diagnose it but to no avail. I graduated from college and haven't had time to set it back up until today. I started downloading demos and it died once while it was on the XBL screen and again while I was playing Just Cause. I bought the extended warrant, so should I just contact MS? Is there any cost to me except for my time without the 360? Should I keep my hard drive or send it with? Thanks