Windows 10: Blank screen when entering BIOS, but Windows Boots fine on ASUS CH7

Discus and support Blank screen when entering BIOS, but Windows Boots fine on ASUS CH7 in Windows 10 Support to solve the problem; Hello, I wanted to check the bios settings and I have suddenly found out, that when I press DEL to enter BIOS, the display is blank. Monitor is On, it... Discussion in 'Windows 10 Support' started by joe42, May 6, 2019.

  1. joe42 Win User

    Blank screen when entering BIOS, but Windows Boots fine on ASUS CH7


    Hello,

    I wanted to check the bios settings and I have suddenly found out, that when I press DEL to enter BIOS, the display is blank. Monitor is On, it has signal, but with blank black screen. Computer starts normally, beeps, displays the AMI initial screen and normally boots into Windows. If I press DEL however, instead of going to BIOS, I get blank screen.

    Baseline:
    • AMD Ryzen 2700X / ASUS Crosshair 7 WIFI
    • BIOS 2008
    • Windows 10 PRO 1809

    Troubleshooting done:
    • Monitor to any other display output (only this one is on, others are off)
    • Different VGA
    • BIOS reset - did not help, although it was reset. I got message that BIOS was reset, press F1 to enter bios, but then - the same issue.
    • BIOS Flashback update - After pressing the button, it blinks 3 times, then turns on, which should be OK. BUt nothing is happening - the led on USB stick does not blink. Whan I interrupt, the PC works as before.
    • EZ Update in Windows - after submitting to update the bios, it restarts, but then enters the BIOS, which is - blank. After restart, all works as before (with black BIOS)
    • Entering BIOS from Windows (Shift-Restart) does have the same effect

    I am out of ideas now - the PC works, just can't get into BIOS to change anything. Of course, now, I have the default settings loaded because of few BIOS resets.

    Interesting is, that when in BIOS, I am getting 0d on the postcode - changes to this after entering the BIOS. In the manual, this value should be reserved for future AMI BIOS errors.

    Any hints?

    :)
     
    joe42, May 6, 2019
    #1
  2. Paul Win User

    PC screen goes blank when attempting to enter UEFI/BIOS

    I am following the steps below to get into BIOS, but when I click restart at the end, my pc restarts, but never enters BIOS. It shows the pc make (Asus) and then goes to a blank screen.

    I try hitting f2 or delete in this blank screen after a while, bit this resolves nothing.

    Is there something else I should be doing or something I should do once the screen is blank?

    Navigate to settings. ...

    Select Update & security.

    Select Recovery from the left menu.

    Click Restart Now under Advanced startup. ...

    Click Troubleshoot.

    Click Advanced options.

    Select UEFI Firmware Settings.

    Click Restart.
     
    Paul, May 6, 2019
    #2
  3. sygnus21 Win User
    No BIOS Post and Blank Screen


    • Short answer yes. With a dead CMOS battery the BIOS loses its settings so it would be very possible to get a blank screen. If it is a CMOS battery, change it and Load Optimized defaults in BIOS and see how that goes.
    • It's also possible its a hard drive issue though you should at least get something on the screen telling you the system can't find a boot drive.
    • There's also the possibility of a dead GPU. Here, as you noted, you wouldn't get anything at all. Simply a blank screen.
    That said, are you absolutely sure there's nothing on the screen? No warnings, notices, or written text? If you have any text on the screen that's BIOS related, there's a good chance it's not a video card problem.

    Unfortunately there are a few things that can cause your issue so you'll have to isolate first to see what's what. Checking the hard drive the way you did is a good start. You could also try installing another hard drive (if you've got one handy) to see what the system does.

    Let us know.
     
    sygnus21, May 6, 2019
    #3
  4. Blank screen when entering BIOS, but Windows Boots fine on ASUS CH7

    No BIOS screen on boot

    Situation:

    Have recently redone water cooling loop. System has been running fine for the last 5 days. This morning I was trying to tidy up cabling and then booted it again to make sure it still worked and everything was connected.

    The login prompt was on the screen, but I didn't have the keyboard there yet. About 15 minutes later I came back with keyboard and mouse from my other computer and it was off. Then I realized that the fan for the NB/IOH was not plugged in, and that it most likely was the reason it had turned off. Although I have not had a fan there longer than that, it does go up to 90C or more without one after a while.

    Now each power on results in a fans an pump starting an leds on the MB, followed a power off and restart with no video on monitor at all. Can't get it to do anything else.

    Steps tried already:

    Reset BIOS by setting jumpers.
    Reset BIOS by removing battery.
    Remvoed ram and left one stick in.
    Tried one stick of alternate ram.
    Checked PSU with tester.

    PSU looks ok and nothing else gets it past the blank screen. Always restarts again after I power it on.

    Thanks for any suggestions.
     
    PopcornMachine, May 6, 2019
    #4
Thema:

Blank screen when entering BIOS, but Windows Boots fine on ASUS CH7

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