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Ports used by TeamViewer
TeamViewer is designed to connect easily to remote computers without any special firewall configurations being necessary. This article applies to all users in all licenses. In the vast majority of cases, TeamViewer will always work if surfing on the internet is possible. TeamViewer makes outbound connections to the…
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Black screen after starting a connection
Occasionally when making a connection with TeamViewer, you may encounter only a black screen upon connection. The following information can assist in pinpointing the underlying cause. This article applies to all TeamViewer users. Troubleshooting A black screen on the remote machine has several causes. Most of the cases,…
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Company logo not displayed within QuickSupport
You can create customized QuickSupport modules for your business showcasing the module with your logo, company colours and text. Learn how here. This article applies to all TeamViewer customers using TeamViewer (Classic) version 12 or below. In case your logo is no longer displayed within an individual TeamViewer module,…
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Error message: Reason Unknown
TeamViewer recommends that all users download and start using the latest version of TeamViewer on all supported operating system platforms. When you see a pop-up offering you to Update Now, please check the version of the TeamViewer (Classic) software you are currently using, and immediately update to the latest version of…
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Fix connectivity issues - Partner did not connect to router
Connectivity issues can be caused by multiple factors, including instability with the ISPs. When starting a remote connection, TeamViewer (Classic) may display the following error message: as well as: This article applies to all TeamViewer (Classic) users and customers. ⚠Important disclaimer: Please note this article is a…
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Log file reading - Incoming connection
TeamViewer writes log files for TeamViewer staff to identify historical actions, technical troubleshooting and bug find in TeamViewer. This article applies to all TeamViewer users. In general, these log files are intended for TeamViewer staff and not for end-users. However, the log files are accessible for end-users too.…
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Not ready. Please check your connection
For the most part, TeamViewer is able to make connections without any special configuration of a device. However, it is possible that your TeamViewer (Classic) may indicate a red light and the message Not ready. Please check your connection. This article applies to all TeamViewer (Classic) users. Here are a few things you…
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Resolve High CPU usage
High CPU usage can usually be attributed to hardware acceleration on systems with weaker graphics processors. The easiest way to resolve this is by disabling the hardware acceleration option of the graphics processor on the remote computer. This article applies to all Windows users using Windows 8 or older. 📌Note: These…
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Solve an aborted file transfer
If you receive the following message during a file transfer, it means that the remote Mac does not have sufficient permissions to access files and folders. This article applies to all TeamViewer users using TeamViewer (Classic) 15.4 or higher on a Mac. Background Starting with macOS Catalina (10.15), macOS asks for your…
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TeamViewer Status - Is TeamViewer Down?
TeamViewer is an internet-based product, and sometimes there are outages. We understand this and that any outage has an impact on your daily business. TeamViewer offers and maintains a status page to allow you to stay up to date with us and the availability of our system. On this page, you can directly see if we are having…