In most cases, attic fans are used to cool the attic.
The reason is: if the heat sync is clogged with dust, no air will move through even with a usb fan so the added air does little or nothing.
You don't actually have to take the computer apart to clean it, this was an example of where the dust hides.
Their will be a Relay and a fuse if I am not mistaken.
You can't be off at work, or not home.
On my truck the bower wiring had discolored and that was due to a loose connection.