I can not access the Intel Boot Agent by pressing Ctrl + S anymore. It used to work just a few days ago until now. My goal is actually to enter the BIOS but I found that it only works after I access the IBA first and then press F4 to save settings, and then quickly pressing F2/F8. However not even the IBA is opening up now. I've tested multiple ports for my keyboard, and tested the buttons and they work generally.
I remember that last time I was there I changed the time that the message appears from 2 to 5 seconds. I tried changing the first 2 options
but there were no other options available anyways. Along with the "press ctrl + s" message, it also says something like PXE above, if it matters.