I would try to connect the monitor with another cable and to a different unit to see if that fixes it, it may have gone bad and may be an easier fix than calling in to set it up for service and mailing it in for repair. I'm fairly certain when you call they are going to ask if you tried other cables or connected it to another unit.
Own a Predator Laptop? Then I bet you have learned a thing or two from beststevie. He has been helping out in this forum for quite a while and it's about time we recognized him for it. Thanks beststevie!