[操作疑難] Question Part 2 of 2 - Router

I have levelone 6003 router which has wifi function bt something wrong
I also have a new levelone 6003 router but not used and not connected
(Total I have 2 router with same brand and same model)

If i want to make a wifi function in my home, could I use the new 6003 router to provide a wifi function?
existing 6003 > New 6003 to get wifi?
if yes, how to set

I know ching wants me to change the new router then solve the problem but I have no confident to do it due to setting, location and time problem!
i need use this "stupid" method to solve it!
pls and thx

FINAL, I HOPE I POST MY QUESTION IN CORRECT SECTION HERE.
IF I DO WRONG, PLEASE TELL ME. I WILL THEN POST AT THAT PLACE
THX CHING AND THX ADMIN!