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My computer was making loud noises, then shut down and won't restart. Could it be the fan went out?

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It could be the cooling fan to the power supply but it sounds like that went completely out and blew the Zenor Diode or something in the power supply. You can test the voltages coming off the power supply to make sure. If that is what happened you are better off simply replacing it. You can get them at Best Buy for about $40 and it is a simple 4 screws to remove in order to trade them out. Make sure you have the correct connectors for the motherboard. If the Power supply is good then you lost the CPU fan. If the CPU fan went out and the computer will no longer start up you may have cooked the CPU. Again, this is something you can replace fairly easily. The fan should run about $12 to $20 depending on what model you get and what type of CPU it has to mount to. The hard part will be the CPU itself. If it has overheated to the point of burning a connection inside the CPU will have to be replaced and while it should not be soldered on the board the heat sink will be very difficult to get off and when you put the new heat sink on to the old CPU or a new one you will need heat sink compound. Runs about $1 a tube. If the CPU just overheated and shut down the PC should restart once it has cooled if nothing else till the CPU heats back up. Usually takes a couple of minutes but not long. This is actually good news if this is what is happening as it means the CPU is most likely operational and that is the expensive part to repair in an over heat situation. The problem does sound like a blown power supply though. If you have to replace the heat sink and CPU fan once you get the old stuff off and as much of the old heat sink compound off as possible make sure you apply new compound to the CPU. You do this by applying a small amount to the center of the CPU and pressing the heat sink into place, this should spread the compound evenly and thinly over the CPU area and form a bond between the heat sink and the CPU to transfer heat between them. The fan normally attaches to the heat sink and locks down on the CPU. Connect the Fan power wires into one of the power supply sockets and everything should come on when you power on the computer. While you have the case open you should take the opportunity to use canned air to blow the dust out of the case and air circulation holes. Heat and Dust are not your friends in computers. Good luck with your repair.

Posted on Nov 11, 2010

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Yes most likely the processor fan is bad. Most computers will shut down if the processor gets above the max temp to avoid damage to the processor.

Posted on Nov 11, 2010

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