Since "ILPI354" most likely refers to the (or similar LG UltraWide/4K monitor models that utilize the ILPI-354 power/LED driver board), and "UPD" refers to an update or revision, this blog post is drafted to target electronics repair technicians and DIY enthusiasts looking for schematic discrepancies or repair notes.
Connects to the Negative (-) side of the large 400V/450V primary filter capacitor. ilpi354 va schematic upd