Yellow Light of Death, basically, indicates 'hardware' failure. Basically if anything has 'failed' it will give you the error. Some say that formatting the HDD fixes it, like 2-3% of the time. Most of the time is the soldering between the CPU/GPU and MB. Though I don't think that is what is wrong with mine. I think the fan failed, cuz when I turn it on, it still boots up properly, then after 3 mins it shuts and gives me the error.
I can't hear a fan start up.