If the main fuse is intact but no standby voltage exists, the low-power standby IC might be defective. ⚡ Unstable or Pulsing Voltages
Provide the voltages you measured at the secondary connector pins.
Test the filter capacitors on the secondary side. Vestel boards are known for using capacitors pushed to their exact voltage limits, leading to premature bulging and failure. 17ips72 schematic
Inspect the optocouplers and TL431 shunt regulator responsible for voltage feedback. 💡 Sound but No Picture
If you want to troubleshoot a specific issue on your Vestel 17IPS72 power supply board: State the exact behavior of the TV. If the main fuse is intact but no
Converts the transformer output back to low DC voltages.
If the TV turns on and yields sound but shows a blank screen, the LED driver is often at fault. The 17IPS72 schematic includes an LED step-up converter. Test the output voltage at the backlight connector. Vestel boards are known for using capacitors pushed
Steps up voltage specifically to run the television's backlight array. Common Failure Points