If the TV shows no signs of life, start at the primary side.
before performing any continuity or resistance checks.
If you want to troubleshoot a specific issue on your Vestel 17IPS72 power supply board: State the exact behavior of the TV. 17ips72 schematic
If the standby light flickers or voltages cycle up and down, continuous oscillation is failing.
Use an isolation transformer when measuring live voltages with an oscilloscope on the primary side. If the TV shows no signs of life, start at the primary side
A typical switched-mode power supply (SMPS) board like the 17IPS72 features several primary circuits.
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. If the standby light flickers or voltages cycle
Uses a dedicated controller and MOSFET to pulse high frequency DC into the transformer.
