You said 3.42 you have pp3v42 If you want a real tutorial get shecmatic. Page 94 power aliases and check one buy one. Probe in order until you find the missing one. Once found, check for a short to ground on that line. If you no short found check what created that line. Is it being to to turn on? If it getting and enable signal. This is not a tutorial.
i need the boardview and schematic for same imac..can you help plz?
The main problem is: How can you diagnose and detect which one is failure?
You said 3.42 you have pp3v42
If you want a real tutorial get shecmatic. Page 94 power aliases and check one buy one. Probe in order until you find the missing one. Once found, check for a short to ground on that line. If you no short found check what created that line. Is it being to to turn on? If it getting and enable signal. This is not a tutorial.