Facing TV Problems? Ask a TV Technician.
After the LG logo appears, does the screen stay lit afterwards or go completely pitch black? Slightly lit is good, pitch black is not good.
This Tv is only a couple years old right? It's worth the effort to call LG Monday and ask for "Customer Relations"...that department is set up to correct issues like yours. Your issue is a shorted LED array. That's why it lights for a second or two, then goes out. It's not jumk yet...not until LG's customer relations department refuses to replace the panel, or pro-rates your TV set for a new one.