This is a VERY common concern in late model large flat screen televisions. The mounting screws on the main board become loose over time due to vibrations from the speakers as well as lower torque values during the assembly process. The easiest way to diagnose if this is your condition is to increase the volume while the TV stays on for more than a few seconds. If by simply raising the volume the TV turns off (and may start cycling on/off) you probably nailed it. Power down, allow several minutes for the capacitors to discharge then remove the back cover, remove each circuit board one at a time. Using a small wire brush or sandpaper, clean the areas that the board makes contact with the frame, where the screws thread in. Install the circuit board a d tighten the screws firmly BY HAND. Repeat throughout and watch your annoying issue become a thing of the past. Bet me and lose……
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This is a VERY common concern in late model large flat screen televisions. The mounting screws on the main board become loose over time due to vibrations from the speakers as well as lower torque values during the assembly process. The easiest way to diagnose if this is your condition is to increase the volume while the TV stays on for more than a few seconds. If by simply raising the volume the TV turns off (and may start cycling on/off) you probably nailed it. Power down, allow several minutes for the capacitors to discharge then remove the back cover, remove each circuit board one at a time. Using a small wire brush or sandpaper, clean the areas that the board makes contact with the frame, where the screws thread in. Install the circuit board a d tighten the screws firmly BY HAND. Repeat throughout and watch your annoying issue become a thing of the past.
This is a VERY common concern in late model large flat screen televisions. The mounting screws on the main board become loose over time due to vibrations from the speakers as well as lower torque values during the assembly process. The easiest way to diagnose if this is your condition is to increase the volume while the TV stays on for more than a few seconds. If by simply raising the volume the TV turns off (and may start cycling on/off) you probably nailed it. Power down, allow several minutes for the capacitors to discharge then remove the back cover, remove each circuit board one at a time. Using a small wire brush or sandpaper, clean the areas that the board makes contact with the frame, where the screws thread in. Install the circuit board a d tighten the screws firmly BY HAND. Repeat throughout and watch your annoying issue become a thing of the past. Bet me and lose……