But you know, What happens when you cant buy another CPU card? Thats the way I look at things. Yes when replacing is easier, you always wanna plan for stuff like this, because nothing lasts for ever, and neither does parts. ive learned this the HARD way repairing TVs.
Example: Flybacks... Are you going to walk into a parts store and purchase a flyback for a 1951 emerson tube type tv? Are you going to walk into the apple store and get a new flyback for my mac SE? probably NOT.... Thats the next project that i plan to tackle is rewiding/making new flybacks. I already mastered regular transformers. but not IHVTs yet. There may not be flybacks for certain things anymore, but there will always be a schematic with specifications (in most cases, other cases is just plain testing on working equip), and there will always be magnet wire. hehe.