Problem Intervideo Dual frequency 28" - shorted flyback?

[Georgian2]

http://shabazz.fr/wp-content/uploads/2020/06/Intervideo_dual_frequency_monitors_manual.pdf

Lifting the P163 (P157) jumper makes the PSU start and has the right voltage. Whith the jumper in, clicking sound....
I put an lightbulb as pictured here and it light up, no clicking sound. Anybody has experience with this chassis? I suspect the flyback at this point..
Thanks a lot.

 

[Georgian2]

I pulled the flyback out and it has continuity between pin 1 and 7/10 so primary winding must be shorted with the secondary... Bad luck here.
https://www.donberg.ie/descript/h/hr_7367.htm

 

[gunblade]

tecknoservice has hr7232 which i have used on dual freq chassis in the past