I recently opened my Acer Aspire E 17 to add some ram. I had to disconnect most stuff connected to the motherboard to get under the motherboard and install the ram. I got a bit paranoid about if i plugged the fan in correctly so i just recently checked if i did. What is saw the fan doing was starting then stoping for a bit and this continues. Is this how a fan normally operates? I don't want to mess up the system because its a very nice laptop. Thanks.