Turn the machine off, give it a few minutes of rest, and then turn it back on. If your cables, ports, and devices are working as expected, and you can’t pinpoint the problem causing a no-signal error, try restarting the computer. Changing the video resolution to the default settings usually solves the problem. If turned low, press the plus button to increase brightness.Īdjust the resolution so that it mirrors the resolution that your video card and monitor support. Here is a great video tutorial on how to update a graphics card driver you can use.Ĭheck that you did not accidentally turn brightness to the minimal level. If the no-signal issue was due to missing drivers, updating the drivers will solve it. Once you identify the correct drivers, download them, then install them on the computer. That’s what you’ll use to search for the drivers. Have your video card model number at hand. But for this, you have to go to the official graphics card website. If you can’t see the Update Driver button, you can do a manual driver update. Update your graphics card drivers to get rid of incompatibility problems. Therefore, it’s advisable to engage a tech specialist to help you. The average user may find this challenging to do. Loosen it and remove it, then fix a new port in its place. Open your device and find where the DisplayPort port is. Removing and replacing ports is a bit technical, so you will require some tech know-how to do this. If you have a malfunctioned DP port, replace it. If you have one like that and the connector is the only faulty part, you can replace it instead of buying a brand-new unit. Replace the adapterĪre you using the wrong type of adapter for your DisplayPort connection? Put it aside and get yourself the suitable adapter type.Īnd if you have the correct type of adapter, but it is defective, invest in a new one, too. Make sure that the quality of the new DP cable is uncompromised by choosing a VESA-certified DP cable. Here is how to fix DisplayPort no-signal errors: Reconnect all your cablesĭisconnect the DP cable or cables if using an adapter, and reconnect them.Ĭlick the image for more infoYou can’t really repair a bad DP cable, but you can replace it with a new cable. If you can spot cursor movements, it shows that the monitor is working and parts of the computer system are working, but something in the system is wrong. Move the mouse about and check whether you can detect the moving cursor on the screen. The no-signal bug may be due to an OS error. Or perhaps you’ve set it to go off after a specified period of dormancy. Maybe the computer or monitor is set to sleep at a particular time. If the computer or monitor is asleep, you won’t get a signal. This mostly happens when the video playback resolution is higher than the graphics card or monitor resolution. If the resolution configuration is incorrect, you may get a blank screen. If you turn the monitor’s brightness down to the lowest setting, the screen will appear blank, even though the video is playing. Some monitors are extra sensitive and will record an error when you alter some settings. If you have the wrong monitor settings or wrongly configured resolution, you’re likely to get a no-signal DisplayPort error. And, as a result, the graphics card doesn’t send video data to the screen as it should. You may get a no-signal error if your graphics card drivers are out of sync.Ĭhanges in software or operating system components due to a software or OS update can cause driver incompatibility issues. Next, connect the cable to the DP port and see if it transmits a signal to the display screen. This would mean the screen you’re connecting it to is also working. So, try it on another device first and confirm that it is indeed functional. The cable you choose has to be in good, working order. To tell whether your DisplayPort ports are defective, test them using a different DP cable. Your DisplayPort cables may be working fine, but if any of the DP ports you’re connecting them to are not operational, you’ll not receive a signal. Or the adapter may not fully process the data, and so it has nothing to output. It may also mean that the adapter cannot receive the signal from the source port. That would mean that the adapter cannot pass the signal to the output port. If you’re connecting two devices using an adapter, it could be that the adapter is defective. But if it doesn’t work, it’s probably damaged and needs replacing. If the cable works, you’ll know it isn’t the problem. Test whether your cable is broken by connecting it to another device. Or when the DP cable coming into the display device does not lock into the port.Ī faulty DP cable may be the cause of the no-signal misery. Click the image for more infoThe problem can occur when the DP cable coming from the source device is loose.
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