There's a Zener on the 12V rail hiding between a couple of caps under a blob of silicon on the one that I have on the bench. There's a FET on the bottom of the board but I don't think it's on the 12V rail. I've tried tracing these out further in the past and hit a dead end with the unmarked (or unreadable) SMD parts on the bottom on of the board. At that point you're already into it for more than a 26" LCD TV is worth.
If I get time I'll have another look at the one I have here, I don't remember what was wrong with it.
|