Saturday, May 09, 2026
Measure the voltage at the backlight strip connector during power-on. If it spikes high (e.g., over 100V) and then drops down toward 12V, one or more LEDs inside the panel are burned out (open circuit).
For in-depth repairs, having the schematics is vital. You can find the PCB layout and schematics on technical forums. Download at Elektrotanya TP.MS3458.PC757 PDF on Scribd: View on Scribd tp.ms3458.pc757 service manual
When troubleshooting a dead board, the first step is checking the power rail infrastructure. Plug the board into AC power and use a digital multimeter (set to DC voltage) to probe the following critical points: Primary Side (High Voltage) Measure the voltage at the backlight strip connector
