PC Master Race

I’ve seen this problem before and it was fixed with a BIOS update. Consider checking for an update.

I would also suggest trying a different cable or connecting your monitor using a different display standard if it supports this.

Some newer monitors can support stuff like HDMI-CEC, HDCP (aka DRM to prevent copying video feeds), and EDID handshakes. Your motherboard, especially if it's older, is probably getting hung up trying to resolve these during boot.

You can go into the monitor's settings and try disabling extra features like HDMI-CEC, upgrade your motherboard bios, switch to display port (or display port->HDMI cable), or try disabiling legacy boot. There's probably some other stuff to try, but that should give you somewhere to start.

You can also gather more info, like if it happens with other HDMI monitors (specifically newer monitors only or all HDMI).

I'd try:

• Powering up the system and monitor without the HDMI connection in place, on the off chance that it's somehow related to power draw the moment that the things are coming on rather than the data connection. If that's the issue, there are fancy power strips (PMUs) designed for server racks that can be set up to power on each successive device with a delay to avoid having large instanteous load.

• Using DisplayPort rather than HDMI (DisplayPort presently can do higher throughput than HDMI, FWIW, IIRC).

• Inserting some device that talks HDMI between the two.

EDIT:

• Try putting both the monitor and computer on the same power circuit if they aren't currently so that you're sure that they have a common ground.

Weird. Is the monitor connected via USB as well?

Try setting a lower version of displayport on your monitor. I have the 57" Mini LED Odyssey and Kubutnu refused to start if I had it on DP 2.1 (i think its 2.1) but dropping it to 1.4 fixed it despite my card supporting 2.1.

Video BIOS.

You'll probably find it works when you set the Odyssey to a lower refresh rate too (effectively a lower bandwidth device), but obv that's not a fix. So flash the latest video BIOS from the card manufacturer.

If that doesn't work, do the motherboard BIOS for good measure. And any firmware on the Odyssey if it has it.

It's almost certainly not a hardware issue and cannot be a driver issue.

I was gonna ask if you had tried a few different cables. I ended up having to buy a brand new display port cable when I got a new monitor. But it’s not even leaving Bootsville? Now that is interesting. What about what the other person said: Do you have a connected via USB as well? If so try booting without that. Did you try the old DisplayPort cable?

I'm the BIOS, there'll be an option for which device to use as primary display, it's usually labelled as PCI or something. Switch that.

Also why hdmi and not displayport?

Some charge leak somewhere? I've had a case in which, if you touched the blend with the connector (sometimes also the finger, static charge), it would turn video off until reboot.

My grandpa had a similar problem when my cousin gave him his old gaming PC. I replaced the GPU with an old 2010 Radeon with a native VGA port as opposed to a converter and then it worked. So now I have a spare Gigabyte (Nvidia-chipset) GPU...

The only problem now is that pressing the "AUTO" button on the old NEC AccuSync 1680×1050 monitor makes it play dead (shut down and not turn on again, even after unplugging it and plugging it back in)... until you press every other button simultaneously. No problem, I manually adjusted the pixel clock's phase.

Now see I have the opposite problem after transferring to Linux lol If the laptop is connected to my thunderbolt 4 dock, the second it turns off.... it turns right back on. I have to unplug the dock to keep it off.