I recently purchased the Acer Aspire E 15 E5-575G-53VG 15.6-inch Full HD Notebook. Shortly after buying it, these black marks seemingly randomly started to show up on the screen. I can't seem to identify a pattern of when it happens, but it's pretty constant at this point. Does anyone know what's going on with my computer? Is it something i can fix or should I try to return it?