There's one fuse you might not have checked because it's totally hidden under the playfield. If you raise the playfield and look near the center (both width and length of the playfield) you'll find a fuse/holder mounted behind a nest of wires. As far as I remember, that fuse protects the coils you are having issues with. It took me a while to find this issue when it happened to me but once I found that fuse and changed it I was all fixed up! Good luck and let me know if that was your issue.
Eric