Legitimate sources (avoid malware-ridden free download sites):
Check the voltage at the backlight connector. If it spikes and then drops, one of your LED strips inside the panel is likely burnt out. If there is no voltage at all, check the driver MOSFET and the boost diode on the board. Safety First! Power supplies contain large capacitors that can hold a lethal charge (400V+) 17ips72 schematic
The 17ips72 boardview often lists components as: 17ips72 schematic
PWB: 17IPS72 REV:2.0 MB: LA-J871P