It seems like it can't make it without PC. TL-WA901ND has no DHCP function, so the only way to login to the setup page is to set up static ip for local area connection on computer and connect PC to...

disable wireless network connection on the computer before you set static IP on it. it can avoid ip conflicts when you try to login to the setup page.

agree with Danymarc. TL-WA7510N is a 5GHz product and you can't search it if your wireless adapter don't support 5GHz.

yes, the channel should be the same with your main router as security type.

Can you access internet from your wireless router directly? Doubt you haven't configure range extender successfully.

Perhaps your driver hasn't been installed successfully. Go to the link to download the driver: http://www.tp-link.com/en/support/download/?model=TL-WN727N&version=V3#tbl_a Then, please refer to the...