I am currently seeing a YLOD on an older 60gig system. The fan itself never seems to even try to spin, is this normal with the ylod? or is it just possibly the fan that is bad? Looking at the bga's they don't look like they have been overly hot, however reflowing hasn't changed a thing, so I wasn't sure if I needed to reflow again or if it was the fan that was just dead so it is throwing that error.. Any information on this would be great!!
id try replacing the fan could be a fast and cheap way to fix it b4 you try anything else maybe even look into the mod section of a few sites and upgrade the fan maybe ..? i havent had the ylod but i have read allot about it in the last 3 days alot of people seem to be getting them this week hmm
You can hotwire the fan as shown here...that will tell you if it is the fan or the mainboard. http://forums.afterdawn.com/t.cfm/f-153/how_to_overclock_your_fan-844137/
I will try that in the morning, do you know off the top of your head if the fan has any signal generation or timing coming out to help count pulses? Based off that thread I should be able to disconnect the fan put it on 12v with a 3v lead on the trigger and it should fire up...unless there is a signal generation that is going into the fan on the 12v side.
Yes there is a signal generation, but it does not matter for a full-speed test...as the "full speed" signal is exactly the same as a simple 3.3V power line. When it comes to fine speed control, that is when PWM generation is needed.
