This is the first time posting on this forum so please remove if it is in the wrong place.
I am having issue with two motherboards MSI B250M Bazooka (Pentium G4600) and a Asrock Z370M-ITX/ac (i3 8350K) both motherboards are posting just fine but are not outputting via integrated graphics to any of the 5 monitors I have at home except with a GPU installed but I tested them with an old dell monitor via DVI at my office and they both worked perfectly off integrated graphics . I have tried multiple different cables and different cables types including DVI. I have also updated the BIOS, reset the BIOS to defaults, disabled PCI-e slots and set both motherboards to only use integrated GPUs but nothing has worked. Has anyone had a similar issue if so what did you do to resolve it? I have never seen an issue like this before and it is starting to drive me mad.