wgreenhalgh
New Member
I am trying to bring a Performa 200/M4150/Macintosh classic ii back to life.
Turning it on results in vertical lines on the display and it does not get to the POST sound. I have followed the steps on this repair document. The conclusion in the repair document is the revision b Power/Sweep Board needs to be replaced. I would like to single out a single bad component via a schematic or see if someone has any experience with this issue that could suggest other possible causes.