Resetting wifi password on iPd Mini

Hi, I’m sure this will have been addressed somewhere in the past, but please point me to a solution. A senior citizen friend has reset her iPad Mini in an attempt to solve a problem transferring photos on it to her iMac running Maverick OS. That problem prior to reset was a message -“Unable to

Optical output problem

Some little time back I detailed my difficulty with non playing optical fibre link from TV to a Bose Soundbar while a similar AV link played fine, if at a (probably) lower quality. After some research I discover that the problem is due to feeding the TV from a Panasonic recorder by HDMI cable