Re: Lg plasma 42PQ60 relay clicks and release

When power is plugged, relay clicks and releases and remains released. 5v sty remains present, RL_ON, 5V_on, Vs_on command present at respective pins of connector P813 of smps. Pfc voltage rises momentarily to 390V and drops. NO VA, VS, 12V and 17V. tried replacing 2A20112 pfc ic, but no change. Also replaced L6599D ic but no change. No shorting of any component at any point. all low value resistance and fuses ok. Any suggestion to attend the defect.