Some keys in laptop stopped working [Closed]

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Sunday July 31, 2016
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Monday February 1, 2010
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Hi
Hello,
I get my sony laptop motherboard changed recently. All keys works fine then.. and i open my laptop to check if motherboard was new or not thereby touched my motherboard. Now some keys like Delete, Backspace, Enter,, Numlock etc are not working. Why? Is there any probability that circuit got damage or effected????? Pls help.

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47523
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Monday February 1, 2010
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October 22, 2020
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It not a motherboard issue but a keyboard circuit issue. It must be cleaned by a technician.