How to resolve issue where unused RAM slot will not recognize RAM

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slot of ram but builtin or ram from company is still responding at any slot but not the new one ram is plz guide me in this

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redmi note 10 price in nigeria slot Moisten a microfibre cloth with 99% isopropyl alcohol and use a credit card to slip the damp cloth into the RAM slot to clean its contacts  one ram slot not working motherboard, watch this video, and learn how to fix no display laptop