Obviously, it is faulty. Hard reset won't help, right? Go to buy a new router.

You can check the compatibility list on TP-LINK website. http://www.tp-link.com/resources/document/TL-WPS510U_V5_CompatibilityList_150123.pdf

@spgggm, what's the firmware version of your WPA4220? @PowerRanger, on their website, it says "Add support for bonjour applications(airplay, airprint) with firmware TL-WPA4220_V1_131219 indeed. Did...

The channel on Wi-Fi extender can be modified and fixed manually as well. You can run the utility for WPA281 and log in its web interface. On Wireless---Wireless Settings page, you can change the...

You can buy a TL-PA6010 to work with the kit. If it is not plug and play, you can pair them. http://www.tp-link.com/en/article/?faqid=258

Bluevolt wrote dosent worked with me i think its a firmware problem What's your model? Why not post a new thread and describe your problem and what you've done in details? Or try to do that here....