RCA Servicemaker!

[captainmoody]

Instead of the "Service saver" chassis made by Zenith, RCA decided to start the "Service maker" line of them instead!
All kidding aside, I used to love seeing those sets come in with fried flybacks! It meant good profits back then and an easy repair. This fly came out of my CTC 21 it was still working (somewhat) note the dripping wax, toasted plate cap lead and carbonized socket at the top (due to a numbskull that had no idea how to put the top of the hv cage back on properly!)
Remember the "no color" problem caused by the bandpass transformer having an open primary?
There also were other annoying problems caused by those incredible corroding coils on the earlier chassis runs.
Can anyone name some other problems/fixes that they may still remember?