Gameboy button diode question

Hello, what are those black rectangle components on the back of the LCD button board? I think thay are diode packs. but whatever they are, I think that is why my buttons do not work.

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@pcwizzy37 post some images of what you are looking out with your Question. For that use this guide Adding images to an existing question That will allow us to see what you see and hopefully identify your components.

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