New 17IPS12 boards cost $30–50. But with a schematic, a $2 transistor or $0.50 resistor can bring a dead board back to life.
Once you find the PDF:
If the exact 17IPS12 is unavailable, download 17IPS11 or 17IPS13 schematics. They are 90% identical (main differences: connector pinouts for backlight). vestel 17ips12 schematic
The standby circuit is a low-power flyback converter. This section is active immediately upon plugging in the TV. New 17IPS12 boards cost $30–50
Symptoms of failure: Backlight flashes once then off, audio present but no picture. Once you find the PDF:
Without a schematic, repairing a switching power supply is like performing surgery blindfolded. Here is why the schematic is indispensable:
The 17IPS12 is a combined Power Supply + LED Backlight Driver board. It’s used in 32” to 43” LED TVs.
Main ICs: