It may have incompatible issue if the printer is not in the list. You can also check the list of other models or other brand.

1. press the pair button of the AV200 and hold for 3-8 seconds. then press the pair button of the AV500 and hold for 1 second. 2. You can also use the utility to join these adapters. Set the same...

have you tried to set up the TCP/IP port on the computer? You can refer to the following FAQ http://www.tp-link.com/en/article/?faqid=240

did you press the pair button for 1 second on both of PA2010? the Powerline led (the second light) on PA2010 is on or off？

Are these units working？ If so, you do not need to bother to enter the password

When you connected the laptop to the unit, did you turn off the wifi connection on the laptop?