Okay, just got a nice shiny new MBP 13.3". It works fine; both on/off power. No issues at all. However, I bought a new Mini Display Port for an HP L1908w monitor for a secondary display. I plug it in, the monitor sees it, then after about 5 - 10 minutes, both displays go blank [monitor and MBP display], and I can't get them back. I have to power the system off completely, and reboot. Any ideas?