YLOD (Yellow Light of Death) is actually a generic hardware failure, though 9/10 times it is a cold solder joint under the RSX chip (GPU), which is also the number 1 cause of the RROD on the XBox 360. You know you have the YLOD if you try to turn on your console, the light flashes green, then yellow (very briefly), and then in blinks red and shuts off. With the Xbox 360 you can always find a secondary error code by holding the sync button and pressing eject 4 times, the number of blinking lights changes with each press, then goes back to RROD after the 4 digit code is received, and this will tell you exactly what is wrong with your console. With the PS3, there is no such option, and you have to basically assume that it's a cold solder joint and try to reflow the RSX chip. Really your best bet is to pay SONY $100 to fix it for you, because there is absolutely no guaranteed fix for the YLOD. In both consoles, the issue is generally caused by the process of the system warming up when in use, and then rapidly cooling when not in use, which causes the solder under the BGA chips (the CPU, GPU, RAM, southbridge, etc) to expand and contract and become brittle. While heating and cooling is what causes the YLOD and RROD in general, it actually (contrary to popular belief) has basically nothing to do with anything actually overheating, it's just the day to day hot-cool process that makes the solder joints go bad, which would not be an issue (or nearly as much of an issue) if Microsoft and SONY were allowed to use lead solder in the BGA joints. They can't, and have to use lead-free, which is much more brittle and susceptible to failure. Hope that helps.