No High Voltage

Model no. Sony KV-32S25
Symptoms: No Highvoltage

Measuring the voltage across the Horizontal output collector i found that the 140VDC drops to 85VDC upon turning-on. When i check the Horizontal driver transistor Q501 it also fluctuates from 85VDC to 140VDC. I remove the H-Out Transistor, then try starting up the set. After powering-up i check the collector voltage of the horizontal drive transistor, now it's stable and it stays on 85VDC. This gives me an idea of the hold-down circuits. Replacing the Flyback transformer fix the problem.