Hi, can someone tell me how to fix the soda fountain? I want to get the picture of the nurse but I don't want to give up on Lindsey.
In case you haven't already got this figured out on your own in the month since you posted your question here are some hopefully useful answers.
First off as of v1.43.1 the soda fountain should aside from a few special scenarios (only the two dreams and the flashback come to mind) always be operational. I'm assuming you are already aware that you need an empty bottle (with or without sprayer head) and $1 to use it. The only time it receives any damage is during the Season 2 Quest "Spell You Later", but the damage is only cosmetic and doesn't actually affect it's functionality.
As far as getting the item "Nurse's Photo" you have two opportunities to get it. The first time is by choosing to go get the Nurse when Lindsey collides with you in the gym during the Quest "Loser to the Rescue". The other option involves using the soda fountain or the trading desk in the English class to get yourself a bottle of Strawberry Juice. After drinking your first bottle of the stuff try to head up the stairs to the First Hall, beginning the quest "Photogenic". If you're after Lindsey's heart it's best to choose "It's probably nothing serious" when you get to the top of the stairs as that will lead to Lindsey helping you get to the Nurse's Office. Doing so also gives you a chance to unlock an as yet unimplemented quest by trying to follow Lindsey instead of entering the Nurse's office immediately.
Regardless of which quest you choose to do this in just enter the Nurse's Office, pull back the curtain, tell her to smile for the camera, and you've got yourself a "helper".
Hope this was at least a little helpful for you. Good luck!