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  1. #1
    New ROGer Array
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    Dec 2018
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    Unhappy Z390-E - Displayport VGA error, cannot access BIOS, system runs normally

    I'm getting a rather weird issue with my system. With my monitor connected to my GPU through displayport, my motherboard lights up with the VGA error LED while booting up. The monitor receives no signal until Windows is booted at the lock screen. The VGA LED stays lit on the motherboard, but the system runs perfectly fine. During this boot sequence, I can mash delete/F2 to try to access BIOS, but when the monitor receives a signal, it will just turn on to the Windows lock screen. If I try booting while connected through HDMI, everything goes smoothly - no error LED, the monitor receives signal while the system boots, and I can access BIOS if I want to. This isn't a huge issue since everything technically works, but it's annoying that I cannot access BIOS with displayport and that the error LED stays on while the system appears to be running normally.

    I'm using a GTX 1070 on a Z390-E board with the Aorus AD27QD monitor.

  2. #2
    ROG Guru: White Belt Array Enderwiggin03 PC Specs
    Enderwiggin03 PC Specs
    MotherboardROG STRIX Z390-E Gaming
    ProcessorIntel Core i9 9900k
    Memory (part number)F4-3866C18Q-32GTZR
    Graphics Card #1EVGA RTX 2070 XC Ultra
    Sound CardCreative Sound Blaster X AE-5
    MonitorASUS VG248QE
    Storage #1Samsung 970 Evo 500GB m.2
    Storage #2Samsung 860 Evo 1TB SATA
    CPU CoolerEVGA CLC280 with 4x NF-A14 iPPC-3000 PWM (push/pull)fans
    CaseFractal Design R6
    Power SupplyEVGA G3 1000w
    Keyboard Logitech G513 Carbon
    Mouse Logitech G703
    Mouse Pad Logitech Poweplay
    OS Windows 10 Home x64

    Join Date
    Nov 2018
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    Quote Originally Posted by Squilliam View Post
    I'm getting a rather weird issue with my system. With my monitor connected to my GPU through displayport, my motherboard lights up with the VGA error LED while booting up. The monitor receives no signal until Windows is booted at the lock screen. The VGA LED stays lit on the motherboard, but the system runs perfectly fine. During this boot sequence, I can mash delete/F2 to try to access BIOS, but when the monitor receives a signal, it will just turn on to the Windows lock screen. If I try booting while connected through HDMI, everything goes smoothly - no error LED, the monitor receives signal while the system boots, and I can access BIOS if I want to. This isn't a huge issue since everything technically works, but it's annoying that I cannot access BIOS with displayport and that the error LED stays on while the system appears to be running normally.

    I'm using a GTX 1070 on a Z390-E board with the Aorus AD27QD monitor.
    When the VGA LED is lit, try unplugging your monitor, wait a few seconds for the monitor to lose power, then plug it back in. This seems to work with my Asus Monitor and booting after BIOS updates on my setup.

  3. #3
    ROG Junior Member Array
    Join Date
    Jan 2013
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    If monitor connected via Display Port... You need to enter BIOS to enable CSM.

    BIOS can be displayed on HDMI connection.

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