Recommend to disconnect the SSD and HDD, then see if it will enter UEFI/BIOS. If not, with them still disconnected, remove the RAM stick from the second slot and place it by itself in the primary dimm slot. If still won't get into UEFI/BIOS, remove that RAM stick and try the other one. Looks like it might be a challenge of process of elimination as to the offending component.