What? No takers?
Hello PaKelley
If you have not already resolved this issue, we suggest you search our online knowledgebase for this product: http://www.support.xerox.com/support/phaser-7760/support/enus.html and please search on Streaks. The Case titled "Light Lines or Streaks or White Vertical Lines (All Colors)" will give you some things to try.
Alternatively, you can visit our Contact Us page for other support options.
Thank You
CherylO-Xerox
Forums Moderator