Here's just one service clinic, this one dealing with Boost voltage, but in the artilcle, Jack Darr gives up some info on HOT current and why it may be high:
http://www.americanradiohistory.com/...-Page-0070.pdf
Boost cap leaky or shorted, or a shorted winding in yoke - both can cause HOT current to increase, and cook the fly.
Here, the biggest killer of flybacks and yokes was heat and humidity, something our region has plenty of during the summer, when the TV was used as a babysitter for the kids. "
The kids said it went fuzzy, then white, and then it smoked. They said they didn't touch it...." Dead give away, either a bad fly, or a focus rectifier stick gave up the ghost.