What your TV is showing (blinking light, dead, no picture)? Do you have a multimeter handy? What is the exact panel or screen size of your TV? Share public link
: Keeps the TV logic board alive so it can listen for remote control signals. 17ips72 schematic work
The energy transferred across the transformer windings is induced as low-voltage, high-frequency AC on the secondary side. Fast-recovery Schottky diodes rectify this power into stable DC: What your TV is showing (blinking light, dead, no picture)
If you cannot flash the BIOS, probe these pins. A stuck-low WP# (tied to ground via a weak pull-down resistor) is a common hidden fault. Share public link : Keeps the TV logic
Assuming 3.3V and 5V are present, press the power button. Does PWRBTN#_EC toggle? Probe pin 36 of the EC (IT8226VG). No toggle? Bad power button board (check connector JEC1 using boardview).