Siemens VNC cursor shows "No input"

26 Aug 2025
Knowledge

Problem

When using VNC EasyControl, or a VNC Client over VPN, you cannot control the HMI and the cursor shows:

no input.png

Cause

This is known behavior on Siemens HMIs. You are either using a password that is marked as "read only" in the HMI's WinCC Internet Settings or something else on the Siemens HMI is forcing your control to "read only".

Solution

When you are connecting to the VNC server, make sure that you are using a password that is not marked as "read only" in the HMI's WinCC Internet Settings. If this does not resolve your problem, please contact Siemens support to assist you with your problem.

Title

Siemens VNC cursor shows "No input"

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Siemens-VNC-cursor-shows-No-input

Siemens VNC cursor shows "No input"

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Siemens VNC cursor shows "No input"

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