Originally Posted by
zamaracrillio
It looks like an overheating issue to me, the damage is usually accumulated over time, then a certain component starts malfunctioning.
Since you want to replace it anyway, may be you can open the back panel, do visual checkup on blown caps, signs of burn areas on the board. Then wait until the TV starts malfunctioning, and measure temperature on various chips and heatsinks with a multimeter. It may be that HDMI heatsink warped due to bad glue and doesn't touch fully the chip, there may be even a visible gap underneaths. In this case the heatsink will remain relatively cool during operation, and the chip under it will overheat. Looking at heatsink
sizes, projected temps are definitely way to high at
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Such analysis would help to avoid similar problems in the future by adding a fan inside the case and checking heatsink attachment quality beforehand. Think what would you do if it happen next day after warranty expired? It well may be the case for some folks given large number of malfunction complains during the 1st few weeks of operation. It looks like some obvious board design errors and production quality glitches may need to be fixed.