Re: Troubleshoot Common HDR And WCG Color Problems In Windows 10
Joao Charlesbois
The troubleshooting steps in this article help resolve common video or display issues with a Dell monitor connected to a desktop or laptop. Some symptoms that indicate an LCD display or video issue include:
The LCD display or video issue can occur due to outdated drivers such as BIOS, video card (GPU), chipset, and monitor driver, or video. It can also occur due to incorrect graphic settings in the operating system, faulty video cable, or outdated operating system updates.
To learn how to manually download and install a device driver such as Chipset, Video card (GPU), and Monitor driver on your Dell computer. (If required, most monitor drivers are delivered automatically through Windows Update.) See the Dell Knowledge Base article: How to Download and Install Dell Drivers
It is essential to verify if the problem is inherent with the monitor, video card (GPU), or video settings on your computer. A straightforward way to identify this is to connect the computer to a known-good external monitor or TV. Ensure that the display cable is firmly connected to the video port on the computer and the monitor. (for example: S-video, VGA, DVI, HDMI, DisplayPort, USB-C, or Thunderbolt 3)
If the issue persists on the other monitor, it may be due to the video card (GPU) or video settings and not the monitor. Go to: Verify display or video issue in Windows Safe Mode, or go to the next step.
Performance issues may occur if there is any type of damage that is caused to the display cables or the LCD screen. LCD screens may show the following symptoms if there is damage to the display cables or to the LCD screen. (For example: The LCD screen stops working, it works intermittently, there is a color mismatch, it flickers, or it displays horizontal or vertical lines.)
Dell monitors provide a self-test feature check (SFTC), an integrated self-test (BIST), or integrated diagnostic (BID) tool. They identify if the screen abnormality you are experiencing is an inherent problem with the Dell monitor or with the video card (GPU) and computer settings.
It is a good practice to isolate the monitor by running a diagnostic test on the Dell monitor when you notice screen abnormalities. (For example: Flickering, distortion, clarity issues, color fade, fuzzy or blurry image, or there are horizontal or vertical lines.)
Dell monitors can be reset to factory default settings using the on-screen display (OSD) menu. This can be accessed using the buttons or joystick that is available on the Dell monitor. For step-by-step instructions to reset a Dell monitor to factory default settings, see the User Guide of your Dell monitor at the Dell Manuals website.
Windows Safe Mode allows us to identify if the issue is related to the operating system, video settings, device drivers, or a third-party software. To learn more about how to boot your Dell computer into Safe Mode, see the following Dell Knowledge Base articles: (They are based on the operating system that is installed on your computer.)
Windows updates can support your Windows operating system in many ways. Windows updates can solve specific problems, provide protection from malicious attacks, or even add new features to the operating system.
Display settings like brightness, refresh rate, resolution, and power management may affect the performance of your Dell monitor. Changing the display settings can help resolve several types of video issues.
Stress Test can thoroughly diagnose the video card (GPU) on your computer and report any potential hardware problem. Running a stress test on your computer can verify if the hardware components are stable and thus reliable.
System Restore is an integrated Windows tool that is designed to protect and repair the operating system. When something goes wrong with your computer, System Restore must be used before restoring the computer to factory defaults or reinstalling the operating system.
Where diagnostic tests on the Dell monitor and video card (GPU) pass, it is an issue with software that is installed on your computer. If the above troubleshooting steps do not resolve the issue, you can restore your computer to factory defaults as a last resort.
Dell computers are built with a small amount of hard disk space that is reserved for reinstalling your operating system. This method is the easiest way to restore your computer to factory condition. The restoration process deletes all user data from the computer, back up all your files before starting this process.
Do you know what to do if your screen goes blank? What if you can't seem to close an application, or can't hear any sound from your speakers? Whenever you have a problem with your computer, don't panic! There are some basic troubleshooting techniques you can use to fix issues like this. In this lesson, we'll show you some simple things to try when troubleshooting, as well as how to solve common problems you may encounter.
There are many different things that could cause a problem with your computer. No matter what's causing the issue, troubleshooting will always be a process of trial and error. In some cases, you may need to use several approaches before you can find a solution; other problems may be easy to fix. We recommend starting by using the following tips.
Sometimes your computer may become completely unresponsive, or frozen. When this happens, you won't be able to click anywhere on the screen, open or close applications, or access shut-down options.
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There are many remote desktop connection problems that administrators may encounter, including network failure, Secure Sockets Layer certificate issues, authentication troubles and capacity limitations.
First, try to establish a session from a client that has been able to successfully connect in the past. The goal is to find out if the problem is specific to an individual client, the network or a terminal server/Windows server.
If you suspect the network might be to blame, try to narrow down the scope of the issue to find the root cause. In doing so, you might discover that the problem affects wireless connections but not wired ones. Likewise, you may discover the problem is unique to VPN traffic or a particular subnet.
It's easy to dismiss the notion that a firewall could contribute to a remote desktop not working, but it's quite common. To avoid firewall problems, ensure that the port your remote desktop software uses is open on any firewalls residing between client computers and the server they connect to. Remote Desktop Protocol (RDP)-based tools use RDP port 3389 by default.
You may need to configure multiple firewalls. For example, the client and the server may both run Windows Defender Firewall, and there will probably be one or more hardware firewalls between the two systems.
Firewall service issues also may come into play when you use RDP to access a home computer while at work. Some organizations configure their corporate firewall to block outbound RDP traffic, thereby preventing connectivity to remote systems.
Security certificates can also cause remote desktop connection problems. Many VDI products use Secure Sockets Layer (SSL) encryption for users that access VDI sessions outside the network perimeter. But SSL encryption requires the use of certificates, which creates two problems that can cause a remote desktop to not work.
First, if remote desktops are going to connect properly, client computers must trust the certificate authority that issued the certificate. This isn't usually a problem for organizations that purchase certificates from large, well-known authorities, but clients won't always trust the certificates an organization generates in-house. Use a reliable certificate authority to ensure that clients establish remote desktop connectivity.
If you're using a certificate provided by an enterprise certificate authority, it is important to note that network clients do not automatically trust the certificate. You will need to download a copy of the certificate authority's root certificate and add it to the client's certificate store in a way that allows it to trust the certificate authority associated with the certificate.
The client must also be able to verify the certificate the server uses. The verification process can break down if the certificate has expired or if the name on the certificate doesn't match the name of the server using it.
Many remote desktop connectivity problems can be traced to DNS issues. If an admin changed a host's IP address, then clients might not be able to connect to the host until the client's DNS resolver cache expires. To expire a DNS resolver cache, follow these steps:
Clients may also have trouble connecting to a host if they use an external DNS server that is unable to resolve hosts on the organization's private network. The fix for this problem is to modify the client's IP address settings so it uses one of the organization's DNS servers rather than an external DNS.
As an alternative, you may be able to connect to a remote system by specifying its IP address rather than a host name. To determine whether an endpoint is connected to the correct DNS server, complete the following steps:
For users to access a remote resource through the Remote Desktop Services, formerly known as Terminal Services, you must assign them the Logon Through Remote Desktop Services right. Otherwise, the users will receive an error when they try to connect to the remote resource. To make sure you have the proper permissions assigned, complete these steps on the remote server:
You could also experience remote desktop connectivity issues if you exceed infrastructure capacity. In an organization with virtual desktops or VDI, for example, clients may be unable to connect if the available licenses have been depleted. Some VDI implementations also refuse client connections if the server is too busy or if launching another virtual desktop session would weaken the performance of existing sessions.
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