Desoldered the flyback and measured it.
View attachment 85932
1-2 0.07 Ohm
6-5 0.13 Ohm
6-2 0.30 Ohm
5-2 0.22 Ohm
9-10 1.0 Ohm
7, didn't get any thing to any pin
However I had about 18 Ohm when measuring from 9 or 10 to 2,6 or 5. Those shouldn't be connected, right?
With the flyback desoldered, no screech sounds from the power board when powering on.
The three diodes showing in the image above (right side), are these internal? Should it measure something between pin 7 and one of the wires going out?
Measuring in the right direction between 7 and 11 that should give some measurement, right?