: While some models are "cold" and may not require one, it is generally recommended to use an isolation transformer when servicing the power supply to protect both the technician and the testing equipment. Part Replacement
Checking for excessive dust, poor ventilation, or loose HDMI/power cables which can mimic serious hardware failure. lg lj7 chassis service manual
Here are the schematic diagrams for the LJ7 chassis: : While some models are "cold" and may