Ok so I have been playing GT5 no different than I play any other game when it comes out... ALOT. However I can see where grinding b spec bob may eventually cause problems. I have a 40 GB Fat that I upgraded the HD to 320 GB. I have had this system a little over 3 years. I get home from work This past tues. morning to find the red light blinking. I then turned on the system and it stayed on about 5 mins. then beeped several times and cut off by itself with red light flashing. I never saw a Yellow light. So I take it apart and do the heat gun thing to the mother board after removing the old thermal compound. Put new thermal compound on and reassembled. Fired it up and it ran fine. I backed up my HD just in case something else would happen. The next day I fire it up and do all 5 of the Bonus Race No. 3 and 2 of the No. 4's. Then set up Bob to grind the 200 mile Indy endurance race. After he finished it ended up being on for approx. 4 hrs. straight. Just as I go back to the main menu, it cuts off by itself and blinks red again. What the hell? Do I need to try to reflux, or will I continue to have these types of problems out of this system?