User Guide

Step 4: Connecting the monitor to a different computer
Using a different cable, connect the monitor to another computer that has video. Turn on the
monitor and the newly connected computer. What happens?
 If the monitor works, the video hardware on the original computer is likely to be the
source of the problems. You can try connecting the original computer to another monitor
that works to update its video drivers.
 If the monitor remains blank, repair or replace the monitor.
HP and Compaq Flat Panel Monitors - DDC Errors
Display Data Channel (DDC) is a type of communication between your computer and your
monitor. DDC allows the monitor to tell the computer what its supported display modes are and
allows you to adjust monitor features such as brightness and contrast from the computer.
DDC/CI (Command Interface) is the channel the computer and monitor use to send and receive
commands to each other. Some DDC/CI monitors support auto pivot, where a rotation sensor in
the monitor enables the computer to keep the display upright as the monitor moves between
horizontal and vertical positions.
If you are experiencing communication errors involving DDC, or you are having trouble with the
auto pivot function on your monitor, complete the following steps:
1. Check the cable between the computer and the monitor to make sure they are connected
correctly and securely.
2. Check the HP Web site for updates to the software you are using with your monitor, such
as HP My Display.
HP Flat Panel Monitors - Content Protection Messages
Interrupt Viewing of High Definition TV or Movies
This document pertains to HP Flat Panel monitors that support HDCP.
When playing high-definition TV or movies, an error message about protected content displays.
The following list shows some of the messages that can appear:
 This content is protected. The content is not allowed to play in current display mode.
 Stop. Your display environment does not support protected content playback.
 This program includes content protection that restricts viewing...
 HDMI HDCP Key - Authentication failed.
 The HD content protection of your display has been compromised.
 This movie cannot be played because a display that is not authorized to play protected
movies is connected.
These types of messages occur because of HDCP. High-bandwidth Digital Content Protection
(HDCP) - a method that is used to protect high-definition content from being copied as it passes
from the computer to the monitor or HD TV. Almost all commercial Blu-ray and HD DVD
movies are protected by HDCP when played.