3008WFP, changing Input Source to HDMI

Hi,

I wish to use my 3008WFP on another pc, which just has HDMI. When connected, I just get a message on the screen saying no DVI-D 2 cable. I can’t get to the desktop. I need to access the Menu to change the Input Source Select I think, but pressing the Menu button will not bring the Menu up. Can someone advise the process please? I tried holding in the power button etc. but no joy.

Thanks