Do not set the same name and password on the 2.4GHZ and 5 GHZ because 5GHZ range is small. If you are out of the range of 5GHZ, you have to connect to the 2.4GHZ Actually 5GHZ have a higher speed so...

Hi I found a FAQ from TP-LINK website. Maybe useful to you How to use print server function on TP-LINK router http://www.tp-link.com/en/faq-415.html

Cannot reset? I always think hard reset is the last ditch. Seems you may ask for warranty.

Do you have any computer using the killer network adapter? I heard this adapter may cause the router dead.

i think this router cannot do this job.