ASROCK Z790 PRO RS/D4 Cant enter bios.

Ive installed my new mobo and Im very happy with it. The only problem is that I get a blank screen when I try to enter the bios. Im a reasonably experienced user, I dont think Im doing anything really stupid, Ive tried about 50 times including using windows hacks. Win 11.

Do you mean that when you tap DEL during POST that it is just ignored, or that when you press DEL, just a black screen comes up - something like that.

Question - Did you place an add-on USB3 or 3.1 PCIe Card in your system, and if so, is your keyboard connected to that card? A lot of add-on cards or front panel hubs may not be initialized until after POST is completed, and so the pressing of the DEL key is not detected until it is too late.

My first suggestion would be to try another USB port on your MB, on the rear of the MB itself. If the board still has a couple of USB2 ports, connect the keyboard there.

If you're just used to not seeing the ASROCK Post screen, and normally have a black screen until Windows loads, then it sounds like the GPU/MB is not detecting the display and until Windows loads (and the video drivers load) you're just setting a black screen.

If you have multiple input options, try another connection. Basically, if you're using HDMI, connect via Display Port, etc. Changing the input may allow the card to properly detect the display during POST.

Also, if your display is set to Auto Detect Input, try manually selecting the input that your using so that it's on the correct input from the get-go.

Or, if you're using any sort of display cable adapter (like Display Port to HDMI) that may be the issue as well. Try getting a direct cable that does not use an adapter. Also, all adapters are not made the same.

There's multiple level of HDMI cables and Display Port Cables and the same goes for the adapters. So you may be using a 4k monitor that has HDMI inputs with a HDMI 1.1 cable, or a display port cable that goes into a HDMI adapter that is only 1.1, etc.

Take the confusion out of the mix and get a straight cable or a more up-to-date adapter for the cable.

Multiple monitors? Have them all powered up.

I had the same trouble when I installed my new MB, I updated my NVIDIA Displayport firmware and it worked a treat. from here : https://www.nvidia.com/en-us/drivers/nv-uefi-update-x64/