Sadly it sounds like the logic boards GPU has failed.
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This series came in two versions the integrated graphics version [https://everymac.com/ultimate-mac-lookup/?search_keywords=Macmini5,1|Macmini5,1] and the discrete graphics versions with the added AMD Radeon HD 6630M GPU chip [https://everymac.com/ultimate-mac-lookup/?search_keywords=Macmini5,2|Macmini5,2].
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This series came in two versions the integrated graphics version [link|https://everymac.com/ultimate-mac-lookup/?search_keywords=Macmini5,1|Macmini5,1] and the discrete graphics versions with the added AMD Radeon HD 6630M GPU chip [link|https://everymac.com/ultimate-mac-lookup/?search_keywords=Macmini5,2|Macmini5,2].
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Sadly the discrete graphics models tended often failed as the GPU chip couldn’t handle what people ran with limited cooling this system had.
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Sadly the discrete graphics models tended to fail as the GPU chip couldn’t handle what people ran with limited cooling this system had.
Sadly it sounds like the logic boards GPU has failed.
This series came in two versions the integrated graphics version [https://everymac.com/ultimate-mac-lookup/?search_keywords=Macmini5,1|Macmini5,1] and the discrete graphics versions with the added AMD Radeon HD 6630M GPU chip [https://everymac.com/ultimate-mac-lookup/?search_keywords=Macmini5,2|Macmini5,2].
Sadly the discrete graphics models tended often failed as the GPU chip couldn’t handle what people ran with limited cooling this system had.