Dear Expert,

I have same issue. The external keyboard can only key in number but not function key.

F1 til F9 also cannot.

I do not have software or programming cable.

Can expert give me some advice.

Thanks

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Split from OP277 - Suddenly no any key is working..

Hey tangwl,

It seems like a technical problem. In this case contact your regional contact partner of siemens:

https://www.automation.siemens.com/solutionpartner/partnerfinder/Home/Index?lang=en

or make a support request to siemens technical support:

https://support.industry.siemens.com/cs/ww/en/sc/2090