So my neighbor just gave me his old HP Media Center PC m7350n. The only problem is upon startup, I get a black screen and it says "Cooling Fan has Failed! Press F2 to continue" Or something along those lines. Alright, so I need to replace it (?). So I opened the computer and I saw three fans. Note: I am pretty new at computer parts. I'm slowly learning. I have no idea which needs replacing, or how to go about taking them out.
I circled the fans in red
Here is the computer guts with no scribbles and red marks
Can anyone please help me?