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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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How To Quiet PC Power Supply--Not a Fan Problem
I have an Enlight 350W power supply that has been doing a fine job for
several years. In fact, it is still doing a good job but has recently developed a high-pitched whining noise. It is not the cooling fan. I opened up the supply, and the noise seems to eminate from a section containing some good-sized toroidal transformers. There are a couple of power transistors on large heat sinks nearby as well, so I don't know which component is the noise source. Anyone have any ideas on how to repair this problem? I was thinking of squirting a bunch of high temp silicone all over the components, but thought that might not be good because it might cause the components to heat up too much. I have a new ps on the way, but would be interested in hearing theories on how to fix this one. RD |
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