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Where are the location of the different sizes back cover screws?

I like to know if some one knows, about the different size screw locations on this computer back cover.

Lenovo 1-151jl7.

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@saenz99088 use the IdeaPad Series 1 Hardware Maintenance Manual to which group your Lenovo 1-151jl7 belongs to. Page 35 shows you where the screws are located and what size they are

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