Steps to consider when replacing a fan in the system unit
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Answer:If you are talking about CPU cooler fan, be sure to disconnect SMPS before handling the CPU as The SMPS contains condenser which stores around 400v AC charge and if you are talking about SMPS fan change, always be sure that the SMPS is fully discharged and no electrical supply is given to it.
Wear a helmet and a rubber shoe to avoid electrical shock..........
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