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On my dell latitude 7490 I encounter a slite problem. Som keys are nearly silent en some have a definitive “click” sound. The keys with the hardest click sound are the delete key and shift lock key
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You can remove the bottom cover and check that your battery isn’t swollen or bulging. I have this exact model and when my battery swelled up, it caused some keys to have louder clicks. Once I replaced the battery with a new one, it was resolved. I’d also suggest blowing out the keys with a can of compressed air in case there’s something stuck under the key.
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