Issues with Ryzen 7 9700X Integrated GPU

I'm in a bit of a pickle here. I'm switching my graphics card from a 7600 to a 9060XT, but I've already packed the 7600 away. The 9060XT is set to arrive around December 4th. In the meantime, I wanted to use the integrated GPU for basic tasks and for some Teams calls. However, the integrated GPU seems completely unresponsive. I first tried connecting via DisplayPort and HDMI with the dedicated GPU removed, but nothing happened. Then I reinstalled the external GPU to access the BIOS settings and selected the option to prioritize the iGPU. After that, when I booted, the system seemed to skip showing the manufacturer logo and eventually defaults to the external GPU, even though I set it to use the iGPU. I managed to get into the BIOS, but it's stuck on a black screen when I try to boot without the external GPU. When I completely remove the external GPU and plug either a DP or HDMI cable directly into the motherboard, I can hear Windows 11 start up, but again, there's no visual output, not even in the BIOS. I'm really stuck here with a functioning iGPU that gives me no visual feedback. What can I do to troubleshoot this? Any suggestions would be greatly appreciated!