虽然DisplayPort (DP) 与 HDMI 和 DVI 连接器相比具有许多优点(DisplayPort (DP) holds many benefits)，但(HDMI)它并不(DVI)完美。由于显卡驱动程序过时、电缆连接松动、设备配置不正确、电缆或端口损坏等原因，显示器可能无法检测到DisplayPort连接。(DisplayPort)
如果您在通过DisplayPort(DisplayPort)接口将设备连接到显示器时不断收到“无 DisplayPort(No DisplayPort)电缆”或“无DisplayPort 信号(DisplayPort Signal)” ，下面列出的建议应该有助于解决问题。
1. 拔下并重新连接DisplayPort 电缆(DisplayPort Cable)
如果您的 DisplayPort显示器未检测到(monitor doesn’t detect a signal)来自您的计算机的信号，请拔下电缆并将其重新插入。重新连接电缆之前，请确保您的 PC 的DisplayPort干净且没有灰尘和灰尘。此外，请确保电缆、计算机和DisplayPort(DisplayPort)显示器之间没有任何异物阻碍接触。
使用一罐压缩空气清除显示器和计算机上DisplayPort上的异物。(DisplayPort)如果在您的计算机上使用DisplayPort适配器，请确保将电缆正确插入适配器，并将适配器正确插入您的计算机。如果适配器有多个端口，请将电缆切换到不同的DisplayPort 。
2. 安装显示器驱动程序
一些外接显示器具有本机驱动程序，可为设备的某些组件或功能提供动力。如果显示器要求您安装驱动程序或配套应用程序，请确保您这样做。否则，显示器可能检测不到来自您设备的DisplayPort信号。请参阅显示器的说明手册或联系制造商以确认设备是否需要支持驱动程序或应用程序才能正常工作。
3.选择正确的输入源
对于具有多个DisplayPort的显示器，请确保使用菜单选择已将DisplayPort电缆插入的正确活动输入源。假设显示器有两个DisplayPort ——“DP1”和“DP2”。如果您的计算机插入第一个DisplayPort或另一个(DisplayPort)DisplayPort的“DP2”，请确保显示器的输入源设置为“DP1” 。
请参阅显示器的说明手册以了解如何配置显示器的 DisplayPort 以及如何在端口之间切换活动输入。
4. 使用不同的 DisplayPort 电缆(Different DisplayPort Cable)或计算机(Computer)
以下可能导致“您的设备没有 DP 信号”错误：
- 显示器的DisplayPort可能已损坏。
- 电缆可能松散地插入端口。
- DisplayPort电缆损坏、磨损或不合格。
使用另一台显示器上的DisplayPort电缆确认它是否处于良好状态。如果问题仍然存在，则电缆很可能是罪魁祸首。
我们强烈建议您使用开箱即用的显示器随附的DisplayPort电缆。(DisplayPort)许多显示器制造商都有离线和在线商店，您可以在其中为您的设备购买原装配件。如果您从第三方供应商处购买，请务必确认您使用或购买的电缆是DisplayPort 认证的(DisplayPort-certified)。阅读本指南以了解更多有关选择 DisplayPort 电缆的信息（不要选坏的） 。(guide on choosing a DisplayPort cable (and not get a bad one))
5. 重新启动 PC 的图形驱动程序(Graphics Driver)
Windows的好处是操作系统有许多内置的故障排除工具可以解决性能问题。如果您的计算机无法检测到通过DisplayPort连接的外接显示器，重新启动display/graphics drivers可能会有所帮助。
从DisplayPort显示器上拔下您的设备，然后按Windows 徽标键(Windows logo key)+ Ctrl + Shift + B。您的 PC 屏幕将变黑约 2 秒钟，您还应该听到哔哔声。将DisplayPort电缆重新插入计算机并检查显示器这次是否接收到输入信号。
此Windows按键序列重新启动所有图形驱动程序，无论是AMD、Intel还是NVIDIA。您还可以使用组合键修复Windows设备上与显示相关的其他故障。
6.重新启动您的设备
如果重新启动图形驱动程序不能解决问题，请重新启动计算机和外接显示器。将显示器从电源上拔下，等待大约 10 秒钟，然后将其重新插入电源插座。*
7.更新设备的图形驱动程序(Graphics Driver)
将您的计算机连接到互联网，然后按照以下步骤操作。
- 右键单击开始菜单图标(Start menu icon)或按Windows + X并在快速访问菜单中选择设备管理器。(Device Manager)
- 展开显示适配器(Display adapter)类别，右键单击您的显示适配器，然后选择更新驱动程序(Update driver)。
- 选择自动搜索驱动程序(Search automatically for drivers)。
Microsoft有时会在(Microsoft)Windows 更新(Windows Updates)期间在您的设备上安装某些驱动程序的最新版本。如果设备管理器(Device Manager)没有找到您的 PC 图形驱动程序的更新，请将您的搜索指向Windows 更新(Windows Updates)部分。
- 选择在 Windows Update 上搜索更新的驱动程序(Search for updated drivers on Windows Update)。
您的计算机应该会自动开始检查系统和驱动程序更新。否则，请选择检查更新(Check for updates)按钮。
8.回滚图形驱动程序
如果您最近安装了不稳定或有问题的图形驱动程序，您的计算机可能会出现各种与显示相关的故障。如果您的显示器在更新 PC 的图形驱动程序后立即停止检测DisplayPort信号，请将驱动程序(DisplayPort)回滚到以前的版本(roll back the driver to a previous version)并重新启动计算机。
- 按Windows 徽标键(Windows logo key)+ X并选择Device Manager。
- 右键单击(Right-click)“显示适配器”类别中的驱动程序，然后选择属性(Properties)。
- 前往 Driver 选项卡并选择Roll Back Driver。
如果驱动程序从未更新过，“回滚驱动程序”按钮将变灰。
9. 更新你的显示器
显示器(Display)制造商经常推出固件更新来修复系统故障并改进其产品的功能。前往您的显示器制造商的网站，检查您的显示器是否有可用的更新。您还可以在说明手册中找到有关更新显示器的详细步骤。
10. 联系显示器制造商(Monitor Manufacturer)
如果上述故障排除未能解决问题，则问题可能与硬件有关。请联系显示器制造商以获得支持或访问您附近的信誉良好的维修店，检查显示器是否有硬件损坏。
在等待帮助时，您可以使用HDMI或DVI等其他接口将设备连接到显示器。
No DisplayPort Signal From Your Device? 10 Ways to Fix
While DisplayPort (DP) holds many benefits over HDMI and DVI connectors, it isn’t perfect. Monitors may fail to detect a DisplayPort connection due to an outdated graphics driver, loose cable connection, incorrect device configurations, damaged cable or port, etc.
If you keep getting a “No DisplayPort cable” or “No DisplayPort Signal” when connecting a device to your monitor via the DisplayPort interface, the recommendations listed below should help fix the problem.
1. Unplug and Reconnect the DisplayPort Cable
If your DisplayPort monitor doesn’t detect a signal from your computer, unplug the cable and plug it back in. Before reconnecting the cable, ensure your PC’s DisplayPort is clean and free of dirt and dust. Also, make sure there isn’t any foreign material blocking contact between the cable, your computer, and the DisplayPort monitor.
Use a can of compressed air to remove foreign materials from the DisplayPort on the monitor and your computer. If using a DisplayPort adapter on your computer, ensure the cable is correctly plugged into the adapter and the adapter into your computer. Switch the cable to a different DisplayPort if the adapter has more than one port.
2. Install the Monitor Drivers
Some external monitors have native drivers that power some components or features of the device. If the monitor requires you to install a driver or companion app, make sure you do so. Otherwise, the monitor may detect no DisplayPort signal from your device. Refer to the monitor’s instruction manual or contact the manufacturer to confirm if the device requires a support driver or app to work properly.
3. Select the Correct Input Source
For monitors with more than one DisplayPort, make sure you use the menu to select the correct active input source you’ve plugged the DisplayPort cable into. Suppose the monitor has two DisplayPorts—“DP1” and “DP2.” Ensure that the monitor’s input source is set to “DP1” if your computer plugs into the first DisplayPort or “DP2” for the other DisplayPort.
Refer to the monitor’s instruction manual to learn how the monitor’s DisplayPorts are configured and how to switch the active input between the ports.
4. Use a Different DisplayPort Cable or Computer
The following could cause the “No DP signal from your device” error:
- The monitor’s DisplayPort may be damaged.
- The cable may be plugged loosely in the port.
- The DisplayPort cable is broken, frayed, or substandard.
Use the DisplayPort cable on another monitor to confirm if it’s in good condition. If the problem persists, the cable is most likely the culprit.
We strongly recommend using the DisplayPort cable that shipped with your monitor out-of-the-box. Many monitor manufacturers have offline and online stores where you can buy original accessories for your devices. If you’re buying from third-party vendors, be sure to confirm that the cable you’re using or buying is DisplayPort-certified. Go through this guide on choosing a DisplayPort cable (and not get a bad one) to learn more.
5. Restart Your PC’s Graphics Driver
The good thing about Windows is that the operating system has many built-in troubleshooting tools that fix performance issues. If your computer won’t detect an external monitor connected via DisplayPort, restarting your display/graphics drivers might help.
Unplug your device from the DisplayPort monitor and press the Windows logo key + Ctrl + Shift + B. Your PC’s screen will go black for about 2 seconds, and you should also hear a beep. Plug the DisplayPort cable back into your computer and check if the monitor receives the input signal this time.
This Windows key sequence restarts all graphics drivers, be it AMD, Intel, or NVIDIA. You can also use the key combinations to fix other display-related glitches on Windows devices.
6. Restart Your Devices
If restarting the graphics driver doesn’t fix the problem, restart your computer and the external monitor. Unplug the monitor from its power source, wait for about 10 seconds, and plug it back into the power outlet. `
7. Update Your Device’s Graphics Driver
Connect your computer to the internet and follow the steps below.
- Right-click the Start menu icon or press Windows + X and select Device Manager in the Quick Access Menu.
- Expand the Display adapter category, right-click your display adapter, and select Update driver.
- Select Search automatically for drivers.
Microsoft sometimes installs the latest versions of certain drivers on your device during Windows Updates. If the Device Manager doesn’t find an update for your PC’s graphics driver, direct your search to the Windows Updates section.
- Select Search for updated drivers on Windows Update.
Your computer should automatically start checking for system and driver updates. Otherwise, select the Check for updates button.
8. Roll Back Graphics Driver
Your computer could exhibit all sorts of display-related malfunctions if you recently installed an unstable or buggy graphics driver. If your monitor stopped detecting DisplayPort signal right after updating your PC’s graphics driver, roll back the driver to a previous version and restart your computer.
- Press Windows logo key + X and select Device Manager.
- Right-click the driver in the “Display adapters” category, and select Properties.
- Head to the Driver tab and select Roll Back Driver.
The “Roll Back Driver” button will be grayed out if the driver has never been updated.
9. Update Your Monitor
Display manufacturers often roll out firmware updates that fix system malfunctions and improve the functionalities of their products. Head to your monitor manufacturer’s website and check if there’s an update available for your monitor. You may also find detailed steps on updating your monitor in the instruction manual.
10. Contact the Monitor Manufacturer
The problem might be hardware-related if the troubleshooting mentioned above didn’t resolve the issue. Contact the monitor manufacturer for support or visit a reputable repair shop near you to examine the monitor for hardware damage.
While you await assistance, you can use other interfaces like HDMI or DVI to connect your device to the monitor.
