Is it plugged into the top of the case or the middle (as shown in the photo's above)? It should be in the middle section (which is the GPU), not the top section (which is the motherboard connections for CPUs that have a built-in GPU...which your's doesn't).There is only a HDMI cable from the PC to the monitor
No image I can see?I've attached an image of the back of the PC there is only 1 HDMI plug option
https://www.pcspecialist.co.uk/forums/threads/posting-images-and-files-to-the-site.78556/Trying to upload having difficulty
So thats plugged into your motherboard, your PC has a GPU (should be lower down) - Radeon XFX in the below image.IMAGE SNIPPED