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Troubleshoot a video connection from a monitor (or a TV being used as a monitor) to a desktop computer. If your computer has a built-in display, see Screen is Blank after Starting the Computer.

This document will help you determine if the blank screen is being caused by the computer hardware, the video signal to the monitor, or the monitor itself.

If you have a flat panel LCD monitor, unplug the monitor power cable, wait about 30 seconds, reconnect the cable and then turn on the monitor. This resets the electronics on the monitor.

If the computer makes a beeping sound when turned on, a card, cable, memory module, or processor inside the computer might have come loose. Go to Reseat loose internal components to check for loose components.

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.

If you can hear the computer fan spinning and see lights on the computer, the problem is probably caused by the video cable connection or the monitor. Continue to the next step.

At first setup, or under certain signal conditions, the monitor might not be able to switch to a new display resolution. Do not shut down or restart the computer. Instead, reset your monitor. 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.

Some monitors do not have on-screen messages but instead use the lights to indicate no signal. When you disconnect the cable, instead of an on-screen message, the light turns amber, indicating that the monitor lost signal and is working properly, but is out of range, or not receiving the signal.

Otherwise, check the video cable connection on the back of the computer and on the monitor. Make sure that it is connected properly and the connecting screws are tight. Turn the monitor off and then back on again (while the computer is on) to see if an image is displayed.

After you have reconnected the power cord, turn on the monitor (while the computer is on) to see if an image is displayed. If there is still no image, continue to the next step.

Connect the computer to another monitor to determine which device has the problem (the monitor or the computer). If you do not have an extra monitor, temporarily connect the computer to another monitor for troubleshooting purposes.

Inspect the video cable and video connectors for damage. Check for sharp bends or breaks in the cable, or bent or broken pins at the connectors. With the monitor and computer off, try to straighten bent pins with a small metal tube, like the tip of an empty mechanical pencil or the tip of a retracted pen.

If you had to straighten any pins, reconnect the monitor making sure that the video cable is firmly connected and then turn on the computer and monitor. If the monitor is still blank, continue to the next step.

Do not remove the video port cover. If your computer came with a graphics card, HP may have installed a plastic cover over the video port attached to the motherboard. Most PCs can use graphics from the graphics card or the motherboard, but not both at the same time. If you remove the plastic cover to connect a monitor (VGA or HDMI), the video will not work unless the graphics card is removed. The better solution is to connect an adapter to make the connection.

In case an item was changed in the BIOS, such as the primary monitor device setting, use the following steps to reset the BIOS back to its default configuration:

If the computer case was recently serviced or moved, a card, cable, memory module, or processor may have become loose. When this happens, the computer might make a beeping sound when it turns on. Use the following steps to check for loose components:

If the monitor still displays a black screen or displays a No signal message, the video hardware may be faulty and needs to be replaced or serviced. If the monitor displays the first startup screen but then goes blank, continue to the next step.

Use this step to configure Windows to use a display resolution that is compatible with the main monitor device. In order to perform these steps, you must connect the computer to another working monitor. If you cannot view the first startup screens, skip to Replace the graphics card or have the hardware serviced.

Use the following steps to change to a compatible display resolution and color depth setting from a standard graphics mode. For flat panel LCD monitors, set the display resolution to the monitor"s native display resolution.

If Windows was recently upgraded, Windows might be starting up into a Power Saving state and producing the blank screen before it loads. After Windows loads (about 2 minutes after turning on the computer), press the power button briefly or press the Suspend key on the keyboard to see if the computer comes out of a suspended state. If the computer opens into a suspended state every time the computer is started, use the following steps to disable Power Saving in the BIOS.

If you need specific instructions for opening your computer, search the HP support website. Go to HP Customer Support, and follow the instructions to find your product.

Once the steel panel is punched, the iBUYPOWER team sets forth on embedding the 5:4 LCD in the new-formed hole. The LCD is purchased as sort of an all-in-one solution, then parts are extracted as needed. Wiring for the panel feeds into an expansion slot box, which is another existing display splitter solution that"s been encased in a plastic shell made by iBUYPOWER.

Moving your expensive and delicate computer or TV LCD monitors can be a very stressful task. You not only have to worry about protecting them during transport, but also about keeping them safe while not in use. The Lightweight LCD Carry Case by Gator really takes the concern out of this task. Great for conventions, musicians, IT technicians and more.