My black iPod Video 60GB just ran out of Applecare in Mid-November (that's a mere 2 MONTHS AGO!). And I now have this "horizontal black lines when backlight is on" issue, just like the rest of you. I'm not sure if I want to get it serviced for a fee. The battery life is also noticeably short these days. I found this information on another site, some of you may find it useful:
"I've been doing research, and my first guess as to what this is, is something called "backlight bleeding" The entire surface of an LCD is backlit from behind by a light source (CCFL light) and the LCD blocks out the light that is not needed. Backlight bleeding occurs when this light is not 100% blocked allowing some light to "bleed" through the LCD causing spots of lighter areas on a dark or black background. Unfortunately, almost all LCDs suffer at least a small amount of backlight bleed because the opacity of LCD panels is not enough to block all light, though it only causes problems if it can be easily detected by the human eye."
- from
http://forums.ilounge.com/archive/index.php/t-202812.html
I would suggest you ALWAYS get AppleCare (3-year service plan) with your products, and if ANYTHING goes wrong prior to the 3-year mark, go get it serviced! If Apple (and other companies) intentionally plan for their products to crap out at the 3-year mark, I'm sorry, that is just evil, and they should be ashamed of themselves for so many reasons.