You have -20 volts on the G-1 of the output so the osc
is running. Testing around the osc will often throw it off
freq so that may be the scream you got.
If yoke wire broken you may be able to patch it if you can dig
out both ends. After that you are pretty much don to a bad
flyback, yoke or damper tube.
HINT ! When yokes get a shorted winding its usually on the
inside windings. Pull the yoke back off the bell. That will give
it air to burn better & you will see it often. Saves time !
If its not burning you may see on the CRT where it was burning.
73 Zeno
LFOD !