problem in the power lock unlock key

[Ompsr]

In my Galaxy a7 2018 the power Lock unlock key doesn't work properly. I press it several times to on or off the screen one time. It suddenly happened today. Pls give me the solution. 

[SliceSupport]

goto service center and look for any damage and key poped or not

[Shailesh_Kumar]

I guess its hardware problem with power key button issue.
Try visiting service center to know the exact problem .

[Ehsank]

this is matter of physical inspection so please visit service centre

[Samsung_Support3]

Dear Samsung Member,

Greetings from Samsung Customer Support!

Please perform the below mentioned steps to resolve the issue:

Open samsung member app > Get Help > Interactive check > Choose the phone hardware you want to check and optimize performance(eg. ports).

For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support