I measured the resistance of the flyback transformer as of four Ohms.
From my point of view this is a proper value.
Unofrtunately DC resistance measurments on a flyback transformer tell you
very little. A single shorted turn in that winding will not change the DC
resistnace enough to see. A shorted turn in anotehr windign will not
change the resistance at all. But either will extract enough energy to
prevent the flyback from resonating, will cause the primary currnet to go
very high and will damage the output transistor.
The only useful test is a ringing test. Basically, you resonate the
widnidng with a capacitor 9arounf 100nF IIRC), then apply pulses to it
(the nromal way is a nopen-collect drier using a BU406 or similar
trasnsitor) and look at the waveform on a 'scope. A good flyback will
show many osciallations before they decay to 'invisible', a bad one will
probably not oscillate at all.
-tony