This sounds like a loose connection problem. Check all your connections carefully and continue running the computer open for a while (until you feel confident that the problem has "worked itself...

From reading through a different thread, I learned that sometimes the heat transfer cream between the CPU and the heat-sink dries out. When this happens, even if the fan is working, the heat will...

Replace the foggy fuse and report on what effect the change has.
One never knows!

You seem to have done the right things so far. Now all that's left is to replace the fan once to receive the replaement one you ordered.
I have a thought about something you might try until you...

sorry about that oversight on my part--but , even though it's more difficult in a laptop, the faults could still be the same.

Before you go to the expense of replacing your motherboard, why not try replacing the fan. (If you are brave, you can try opening it up, cleaning out the shaft and repacking it with grease). ...

If you want to get your mom on your side, point out that, while these LEDs use a minimum of electricity, (if you leave your computer running during the night) they can provide enough nightime light...

Could it be that the fan's connections are at fault--perhaps a loose or disconnected wire is being sensed by the mobo and therefore the fan option is greyed out. Look inside the tower and check all...