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  1. #1
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    Asus ROG 2080ti/CH8W: White VGA light with Displayport only, intermittent issue

    Hi all, new build, I have an issue and it's a weird one:


    ROG Crosshair VIII X570 Hero (Wi-fi) - BIOS flashed to v1105
    AMD R9 3900X
    ROG Strix 2080ti (OC edition)
    G.Skill TridentZ RBG DDR4 3600 x4 8gb 16-16-16-36
    Seasonic Focus+ Gold 1000FX (1000w)
    Corsair H150i Pro
    Gigabyte AORUS 1 TB M.2 PCIe 4.0 NVMe
    Windows 10 Pro x64 (1909)


    I've had a lot of issues getting inconsistent boots. When using displayport about one in every five boots results in code AA and no LEDs lit with monitor signal immediately and the option to boot to BIOS, but the other four out of five attempts result in no signal to the monitor and the white VGA light illuminating. Q-Code AA is still displayed. However, with the graphics drivers installed and windows coming up, the OS seems to detect the fault and gives the card a kick, restoring the signal. The white VGA light remains lit, but the display comes up eventually and runs fine from there. This means I can't get into the bios via displayport unless I keep hitting reset until I get a 'good boot' and the white VGA light goes out.


    I did a lot of troubleshooting:

    - Cleared CMOS and popped the MB battery out for a few minutes.

    - Ran the RAM underclocked (no D.O.C.P profile).

    - Inspected and reseated CPU - no bent pins - currently running on stock cooler to eliminate the H150i Pro - no difference

    - Reseated GPU and tried PCI-E slot 2 - no difference

    - Built up outside of case with only a single RAM stick installed, CPU and GPU, tried with different individual sticks - no difference

    - Tried my old 650w Corsair PSU with it's own cables - no difference

    - Tried booting the 2080ti again but this time with nothing connected to it (no DP or HDMI cable) - no difference

    - Tried my old GPU (Strix R9 Fury) - worked flawlessly despite repeated reboots and resets

    - I tried the 2080ti again but this time with HDMI - works flawlessly every time despite repeated reboots/resets using displayport and HDMI.

    - I purchased a certified displayport cable which definitely does not have pin 20 connected. No difference.

    - I also tried powering off the monitor, unplugging from the wall, doing the same with the PC and restarting everything over an hour later. Unlike many others I've found by googling, this does not solve my issue.

    Stumped. HDMI continues to work without fail on the 2080ti. I get to q-code AA and all of the boot sequence LEDs turn off - happy days. But since my monitor is 75hz/Freesync and listed as compatible with the freesync/GSync updates I want to use DP for obvious reasons.

    However, with Displayport, I still have about 1/5 boots go through successfully with no boot LEDs lit and the rest fail, then recover, with the white VGA LED remainig lit.

    I'm thinking of RMAing the GPU but would be interested in any thoughts you guys might have?

  2. #2
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    A quick update.

    I didn't do much more stability testing as with everything running at stock I'm not anticipating stability issues. I just wanted to find out what would happen when I stressed the components, particularly the GPU, to weed out any other hardware faults.

    I've now run:

    - Aida64 stress testing for 1 hour with everything other than GPU and HDDs stressed. I've had no issues as everything is running on stock voltages. I have repeated this test on both HDMI and DP (DP after power cycling until I got a 'good boot')
    - Realbench for 1 hour using HDMI - no issues
    - Realbench for 1 hour using DP (after power cycling until I got a 'good boot') - no issues

    I honestly have no idea what could be causing the boot issues other than the GPU as everything works flawlessly at stock apart from the GPU when booting using DP. I'm opening a support ticket with ASUS.

  3. #3
    ROG Enthusiast Array ROGod's Avatar
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    I had the same issue on an brand new PC build recently (before I even had an chance to install Windows).

    • No video signal on power up / cold boot (all the fans were turning, but the monitor just kept going into standby).
    • The Q-LED for VGA on the motherboard was staying constantly on (white).

    *The display did come to life one time out of about 20 or so power on attempts (so I guess it does work very intermittently).

    Workaround - (please see my post below for the actually fix / solution).

    In my monitor settings I found an option to change to a different DisplayPort version.
    So I switched from version 1.4 (default) to 1.2 and that fixed it.
    I've have not had an 'no video signal' problem on power up -or- reboot since.

    Click image for larger version. 

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    It's certainly easy to see how people might draw the wrong conclusion troubleshooting this issue and think it's a hardware fault.

    [EDIT]

    If you change the DisplayPort version back to v1.4 when you in are Windows that will work fine.
    Just bare in mind if you reboot or power up from cold you will get no video signal until it reaches the point when the Windows login is displayed.
    Hence if you need to get into the BIOS or need to see any pre-boot options or on-screen errors your have to switch back to DP v1.2.


    I have now logged an official support ticket with ASUS to make them aware.
    Last edited by ROGod; 01-08-2020 at 04:24 PM. Reason: Updated and tided up post

  4. #4
    New ROGer Array Khean PC Specs
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    MotherboardROG Strix Z390-E Gaming Motherboard
    ProcessorIntel 9th Gen Core i9-9900K OC 5.0Ghz @1.305 Adaptive
    Memory (part number)Corsair Vengeance Pro RGB 2x16 32gb 3200mhz
    Graphics Card #1ROG Strix GeForce RTX 2080ti OC 11gb GDDR6
    Sound CardSupremeFX Onboard
    MonitorASUS ROG Swift PG279Q Gaming Monitor
    Storage #1Corsair Force Series MP510 M.2 NVMe PCIE Gen3 240gb
    Storage #2Seagate Baracuda 2TB Mechanical Hard Drive
    CPU CoolerCorsair Hydro Series H150i Pro RGB 360mm
    CaseCoolmaster Mastercae H500P Mesh
    Power SupplyCorsair RM 750x Gold Certified
    Keyboard HyperX Alloy Elite RGB MX Cherry RGB Red
    Mouse HyperX Pulsefire Surge
    Headset HyperX Cloud Fligth Wireless
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    Try 3DMark TimeSpy (Paid) or Heaven Benchmark (Free)on your GPU.

  5. #5
    ROG Enthusiast Array ROGod's Avatar
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    [UPDATE]

    ASUS support got back to me, and they were very helpful.

    It turned out my 1080ti graphics card required an DisplayPort (GOP) update.
    This is so it will work correctly with the CSM (Compatibility Support Module) set to disabled.

    In my case the update came directly from Nvidia: https://www.nvidia.com/en-us/drivers...fi-update-x64/
    *But I would certainly check with your graphics card manufacturer first to see if they have their own update.

    After running this update I can now report everything is now displaying fine when using DisplayPort v1.4.

    Click image for larger version. 

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    - Hopefully this information will help someone else out.
    Last edited by ROGod; 01-08-2020 at 04:22 PM.

  6. #6
    New ROGer Array Oversemper PC Specs
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    MotherboardROG Strix X570-F Gaming
    ProcessorRyzen 3800x
    Memory (part number)CMK32GX4M2B3000C15
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    Just changed i7 3770 platform to ryzen 3800x (asus rog x570-f), the GPU is Radeon VII under custom water.

    I have the same issue! From time to time it beeps during boot up, then windows eventually is getting shown on the screen alright but the WHITE LED on the mobo is left shining until I reboot.

    Quote Originally Posted by ROGod View Post
    Hopefully this information will help someone else out.
    Thank you very much ROGod for you info!

    But could you please give me a link to the asus web-page where I can submit ticket? Also, please write your ticket number so I can refer to it, I think it will speed up things. Thank you!

  7. #7
    ROG Enthusiast Array ROGod's Avatar
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    See: https://www.techpowerup.com/252476/a...-uefi-support?

    UEFI (GOP) BIOS - FLASH AT YOUR OWN RISK.

    amd_radeon_vii_bios_v106_x64.zip

    1. Extract the contents of 'amd_radeon_vii_bios_v106_x64.zip' to a folder.
    2. Right click and run the 'amd_radeon_vii_bios_v106_x64.exe' as admin.
    3. Reboot your PC after the update completes.
    Last edited by ROGod; 01-17-2020 at 05:37 PM.

  8. #8
    New ROGer Array Oversemper PC Specs
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    MotherboardROG Strix X570-F Gaming
    ProcessorRyzen 3800x
    Memory (part number)CMK32GX4M2B3000C15
    Graphics Card #1Radeon VII
    Storage #1SAMSUNG 970 EVO Plus MZ-V7S500BW
    Storage #2INTEL 660P SSDPEKNW020T8X1 2Tb

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    Thanks, but I already flashed it (on intel platform) for my rad7 when it got released in February 2019; on asus p8z77-v pro everything worked seamless. One week ago switched mobo (rog x570-f) and cpu (3800x), complete reinstall latest every bios and drivers, and have this intermittent issue with white (vga) LED stuck on boot with no monitor signal during post but signal appearing during windows boot (display port 1.2, 4k@60Hz, freesync).

    Anyway I'm glad that this seems to be a problem other than my gpu dying, coz it's underwater and reassembling it for RMA is a pain.

    I'll try submitting it to asus, coz it got to be a mobo related issue.
    Last edited by Oversemper; 01-20-2020 at 11:05 AM.

  9. #9
    ROG Enthusiast Array ROGod's Avatar
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    ASUS support: https://www.asus.com/support/Product...nform/?lang=en

    Interesting AMD pulled that firmware update officially.
    You are probably aware but apparently the new Radeon drivers are causing some intermittent black screen issues for some people.
    But your problem does appear to more along the lines of what I was experiencing.

    I guess you would have to dismantle your loop and try a completely different graphic card to really know if it's the mobo or the graphics card.

    -FYI
    My 1080ti worked fine on a Intel Z170 mobo without a firmware update before I fitted it into the X570 TUF, then it needed that DP update.
    That's why I'm still leaning towards it being a graphic card issue.
    Last edited by ROGod; 01-20-2020 at 01:35 PM.

  10. #10
    New ROGer Array Oversemper PC Specs
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    ProcessorRyzen 3800x
    Memory (part number)CMK32GX4M2B3000C15
    Graphics Card #1Radeon VII
    Storage #1SAMSUNG 970 EVO Plus MZ-V7S500BW
    Storage #2INTEL 660P SSDPEKNW020T8X1 2Tb

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    I figured out the issue for me, at least how to prevent the white led on boot-up. I need to turn on monitor first and then boot the PC. So its something to do with monitor not responding via DP to the PC during post. The monitor has an irritating flickering stand-by led, so I always turn it off completely. For some reason asus rog x570-f does not like that.

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