So I've got my hands on a friends SP3. He's been docking it with the MS dock and using a display port hub for multiple external monitors. He calls me up and says the external displays stopped working and then after a few reboots, the Surface stopped booting. He called it a "blue screen" so I fully expected to see a BSOD. After a hard reset the Surface splash screen appears, then the display goes to a dark/royal purple... that's it. As far as I can tell this "looks" like the second monitor during a normal login, but there's nothing on the screen. No errors, nothing. Any troubleshooting hints? Thx.