Lcd Led Repairing Guide: Ebook

A short circuit inside the glass panel itself, usually due to moisture or a cracked driver chip (COF – Chip on Film).

You need a Constant Current LED Backlight Tester (~$15-30). Do not use a multimeter on diode mode—it won’t provide enough voltage. lcd led repairing guide ebook

One or more individual LED chips inside the panel have shorted or burned out. The power supply detects an overcurrent/undervoltage and shuts down the backlight to prevent fire. A short circuit inside the glass panel itself,