Last week I turned on my computer, scanned something and when I then tried to upload it to a website the computer just started re-starting and would not load to the point I could do anything.
Thinking it could be overheating, I shut everything down and found that the fan was caked in dust. Using compressed air I cleaned out all the dust and reconnected the computer but it still will not boot. Looking into the case with a flashlight it does not appear that the fan is turning, should it be upon start up?