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I've tried replacing the 3.9uF Cap and adjusting the width coil, but there's no improvement. It just pushes the problem left and right across the screen. Any other ideas?

Thanks for the quick responses. The ferrite core appears intact. I'll replace the 3.9uF cap and see if it makes a difference

I recently bought and repaired a Mac SE - but whenever it boots, about a third of the screen is blurry. I assumed it was a logic board problem, but testing both the SE board in an SE/30 (which worked fine) and the SE/30 board in the SE (which produced the lines) revealed that it's actually an...