Does the keyboard of HP Pavilion 15-dk0047tx need to replaced if the right arrow key is not working?

[Rit16]

Does the entire keyboard of HP Pavilion 15-dk0047tx need replacement if the right arrow key is not working or if the key cap has come out of its socket and cannot be put back in its place because it appears that something very tiny may be out of place / may be broken. Before this happened, my down arrow key stopped working but then it started working again. The down arrow key does not respond very well. I tried uninstalling two keyboard drivers and restarted the system but the right arrow key still did not work. Please tell me if only the right arrow key can be replaced or repaired. I don't want to disturb any other keys in my laptop's keyboard except the "right arrow key" and "down arrow key" because other keys are working perfectly. Please also tell me what would it cost me to get these repaired. Please someone help me ASAP. 

[banhien]

@Rit16 

Yes, you have to replace the whole top cover part # L57596-001 which is N/A from HP

           https://partsurfer.hp.com/partsurfer?searchtext=7LG86PA

Regards.