Klv 40ex330 no display
I got a sony set klv40ex330 for repair, it had sound but no picture, the backlight was bright. Opened the seat and started fault finding. First of all, I checked the voltage of the board and it was fine, then I checked the lvds data from the main board and it was also correct. Now open the bezel of the panel, check the dc to dc power supply in the scalar strip, the vdd was fine, the avdd was also working, the other voltages were also correct, now check the lvds data, the signal was reaching the main IC, that is, the data processor. When I checked the voltage, one of the conductors was not passing the voltage. When I checked with a multimeter, it had exceeded its value. The chassis number of the conductor was B12. After replacing it, the display of the panel turned on – with the fault image. I am attaching you can see
Understanding LVDS Transmitters
Shaukat Ali has over 30 years of experience in LED TV repair, specializing in chip-level repair work. He is an expert in Sony LED TVs, and also repairs other major brands like Samsung, TCL, Orient, and Haier. His expertise includes display panel faults, motherboard issues, power supply circuits, T-Con, and HDMI faults. Based in Lahore, he shares real-time fault finding cases from daily repair work to help technicians and learners with practical experience.
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