I found this series of lectures about CRT monitor repair on youtube. They take a while to watch, but I learned a lot from them! If you're new to this they're definitively worth a look. He also talks about switching power supplies.

4 Parts:
http://www.youtube.com/watch?v=YsZ5PJB-w2s&feature=related
http://www.youtube.com/watch?v=En75fI6KioA&feature=related
http://www.youtube.com/watch?v=gs0wLG0f-ps&feature=related
http://www.youtube.com/watch?v=AYoNIoJNVWY&feature=related

Thanks,

-Jason