Having repaired dozens of these boards, here are the three most common issues the schematic will help you solve:
Disclaimer: Always ensure you have the legal right to access repair documentation. Many schematics are shared under fair use for repair purposes only. la-d401p schematic
You can find the LA-D401P schematic and DA0AM6BBA0 REV 1.0 Boardview via: Having repaired dozens of these boards, here are
Warning: Be cautious of malware. Only download from reputable repair forums. A genuine LA-D401P file is typically a PDF (schematic) and a .CAD, .BRD, or .FZ file (boardview). Warning: Be cautious of malware
The LA-D401P is a switch-mode power supply (SMPS) board designed by LG. Its primary function is to convert AC mains voltage into the various DC voltages required by the TV's mainboard and the OLED panel itself.
Because OLED panels require specific current regulation to fire the organic pixels, the precision of this board is critical. A failure here doesn't just mean "no power"—it can also manifest as backlight issues (in older LED/LCD hybrids) or, in the case of OLEDs, a failure to initialize the panel.