[Solved] Red VGA LED - When starting the computer, it does not display an image and lights up

The situation is as follows, the day before yesterday I started preparing my computer for the installation of Windows 11. I cleaned up the drive, etc., due to the possibility of upgrading to 11 from 10 (because I had a key for 10), I first installed Windows, and after the initial installation of system updates, I proceeded to check what I still need to do to install Windows 11. It remained to turn on TPM 2.0 and Secure BOOT. After enabling TPM, I had a bit of trouble figuring out what to do and how to enable Secure BOOT, but somehow I figured out where to change the settings in order for the Secure BOOT option to appear, but as it turned out, I must have messed something up, because after turning the computer off, it wouldn't show the image again. From preliminary diagnoses, it seems that there are 4 LEDs on my motherboard for initial problem information (CPU, DRAM, BOOT and just VGA). When booting up, everything looks like the computer is booting up correctly, but when I turn it on, the VGA LED is still on, which according to the motherboard instructions indicates a problem with the graphics card. From my tests, however, it seems that the graphics card itself is not the culprit here (I've tried replacing the card, booting on the integration, on the other PCI-E x16 slot). Even rebooting the CMOS memory does not help. Therefore, this is where my ideas on what the problem might be and how to figure it out end.

MOBO - Gigabyte Z370 Gaming K3
CPU - Intel I5-9600KF
RAM - 2x8GB Patriot Viper 2666MHz
GPU - Zotac GTX 1660 Super
PSU - SPC Vero M2 650W

Boot with a different graphics card, the image should be displayed and upload the latest bios.

Enabling Secure Boot at GA corrupts the graphics card keys, apparently they still haven't fixed this.

I wrote that I tried replacing the card; this did not help at all.

This processor does not have an integrated card, so how do you expect to try it with an integrated card?

Swap to another CPU with an integrated card, or to a card from AMD for example, and then test.

You may end up programming the bios.

True, I misspoke, I was simply trying to get any kind of image without a graphics card, because it occurred to me that the computer is capable of displaying anything even without an integration, but never mind. Regarding the BIOS software. Is there any possibility for me to do something about it in a situation where it doesn't even display an image to me?

Probably only with the programmer, the board as far as I can see has no other options to upload the bios in case of problems (no dualbios/qflash plus etc).

Look at the board's serial no. , where the first
BIOS version < F10>, which ensures the board's compatibility with the 9th gen processor (i5-9600), is dated 20 July 2018.
- The first four digits - > year and month respectively.
If the motherboard is shipped to consumers, for example in September, there is a good chance that the BIOS version is already F10.

Link_ support cpu 9th _ver.Bios

If you have a lower Bios ver.
- upgrade in service by programmer
- "find" an 8th gen cpu with embedded graphics and ... the board has DVI-D / HDMI 1.4 > you can do the Bios upgrade yourself

* diagram of this board on Z370

p.s
For a 9th gen cpu, the Z390 chipset is recommended .

I have the bios uploaded under the 9th generation because I previously used a processor 8 and after time I replaced it, so the question is more about the programmer, namely whether someone specific is in such a ratio to recommend because I am green in this topic.

Ok, I tinkered around a bit and it turned out that the problem was most likely with the BIOS. The version I had was F15a, for some reason after a CMOS reboot it wouldn't reset all the settings and something switched my BIOS to boot continuously from the integration (which my CPU didn't have). Replacing the processor with an integra-compatible one gave the BIOS an error-free upload and the problem was resolved.