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The Sega Genesis (also known as the Mega Drive) is Sega's most successful video game console to this date.

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No controller works in either port.

I've cleaned the contacts, and checked continuity right to the chip, but not controller works in either port (tried several). Anyone seen this before? Console works fine otherwise.

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Andy Batson I would make sure that the controller is working for sure. After that you will have to check the I/O IC Sega 315-5364 and Sega 315-5309 to make sure that those are working. This is an excellent vintage console so you may need to do some board work like check your capacitors who are all getting pretty old and tired by know. So a good recap maybe necessary. In the meantime take a look on here (it’s the PAL version but controller circuit should be identical) Mega Drive Maintenance Manual PAL G, August, 1992, Rev. A. Post some pictures of your board etc. with your question so that we can see what you see. 在已经存在的问题里加入图片

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