shorted flyback...overloaded regulator or blown diode due to load... blown input fuse.
cracked is sometimes okay...but stuff oozing out means it's been super hot....enough to melt the potting material and have liquid molten plastic come out.\
I'm still going to have to see a wide shot of the board to determine if it's a regular k7000 or the zenith tube "k7000a".... as all different flybacks have been used in the k7000 series including some white, gray, and black ones.