DUI is actually trying to display DVI on the box (the LED won't display the V and makes it a U). You typically see this error when your connected to your TV through an HDMI cable and the handshake for HDPC is lost. The box thinks your TV doesn't support it and wants you to change your connection. The error should go away once it finds that handshake. If you were using a different input on your TV, maybe a composite or something for a DVD, and then switch back it can get lost. If it doesn't clear right away try shutting everything off and turning it back on by turning on the TV first and then the box.
Answers & Comments
DUI is actually trying to display DVI on the box (the LED won't display the V and makes it a U). You typically see this error when your connected to your TV through an HDMI cable and the handshake for HDPC is lost. The box thinks your TV doesn't support it and wants you to change your connection. The error should go away once it finds that handshake. If you were using a different input on your TV, maybe a composite or something for a DVD, and then switch back it can get lost. If it doesn't clear right away try shutting everything off and turning it back on by turning on the TV first and then the box.