At first setup, or under certain signal conditions, the monitor might not be able to switch to a new display resolution. If you need instructions for resetting your monitor, search the HP support website. Go to HP Customer Support, and follow the instructions to find your product. If you do not hear noise from the fans and the power lights on the computer are not on, the problem is related to the computer, not the monitor. To troubleshoot a computer that does not start, see Computer Does Not Start.
For flat panel LCD monitors, set the display resolution to the monitor’s native display resolution. With the power cable removed press and hold the power button on the front of the computer for 5 seconds. You can use these steps even though you cannot see anything on the monitor. If the new monitor works, the original monitor or its cables are faulty. Try connecting the monitor with a different video cable.
If you cannot select your monitor’s native display resolution, then update the computer’s graphics drivers and repeat this step. Use the following steps to change to a compatible display resolution and color depth setting from a standard graphics mode.
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Make sure that it is connected properly and the connecting screws are tight. Turn the monitor off and then back on again to see if an image is displayed. If you see the initial HP logo screen but later lose the picture, go to Connect the computer to another monitor. If a message is displayed, the monitor panel is working and the problem is related to the video signal. For further troubleshooting steps, see, Flat Panel Monitor Displays Message about No Signal, Signal out of Range, Sleep, or Power Save.
- Unfortunately, the alert gives you no idea whether the problem is related to hardware or software.
- A kernel panic occurs when the kernel of the operating system discovers something that requires you to restart your computer.
- Getting the black screen of death on a Mac is sometimes accompanied by a message to restart your computer.
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If the monitor still does not work, replace the monitor power cable. Replace or service the monitor if it still does not turn on.
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After you have reconnected the power cord, turn on the monitor to see if an image is displayed. If there is still no image, continue to the next step. Make sure that you have the monitor power adapter cord plugged into the power connector. Otherwise, check the video cable connection on the back of the computer and on the monitor.