The function keys do not respond when being pressed

Which products are affected?
ESP-HMI1-P (HMI Designer V1.7)
H605/H606 (Hand-held unit)

What happens?
The surface of the function keys (F-keys) only responds partially when being pressed.

When does the problem occur?
The response described above occurs after the keypad has been switched on.

Possible diagnostics?
None.

Short-term measures/recommendations?
None.

Evaluation:
The function keys of the keypads H605 and H606 do not work at all or only partially.

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/200806371/1/
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