I have a client who's monitor has an orange screen with white vertical lines on it. When she told me, it seemed like an issue with the cable she was using to connect the monitor to the desktop which was DVI-D, so I asked if she has an HDMI port on her desktop and she unfortunately does not. Only dvi and VGA. So I told her to use a VGA cable and she did, when she turned on the desktop, and a sign said "Monitor going to sleep" then turned off. With the dvi connected she could use it but the screen looked god awful, with the vga, the desktop turns off. Is it a psu issue? I have no specs of the desktop.