Red LEDs on the Logic board (Round one) means that its no seeing the graphics cards. Check connections on the graphics cards as well as for bent pins. Also make sure that all screws on the graphics cards and PSU are tight. a loose screw can trigger weirds things as well.
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Logic Board Error LEDs
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CPU Check: This indicates that there is a connection issue between the logic board and the CPU riser card. Verify that
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the edge connector on the CPU riser card is fully seated into the slot on the logic board.
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GFXA Check: This indicates that there is a connection issue between the logic board and Graphics Board A. Check
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the mezzanine connectors on both the logic board and graphics board to be sure the connections are fully seated.
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GFXB Check: This indicates that there is a connection issue between the logic board and Graphics Board B. Check
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the mezzanine connectors on both the logic board and graphics board to be sure the connections are fully seated.
Red LEDs on the Logic board (Round one) means that its no seeing the graphics cards. Check connections on the graphics cards as well as for bent pins. Also make sure that all screws on the graphics cards and PSU are tight. a loose screw can trigger weirds things as well.