A cooling fan is used to disperse the heat generated by an LCD TV and prevent it from overheating. Over time, the cooling fan can break and need to be replaced. If the cooling fan is not working, it can cause the Sony LCD TV picture lamps to burn out. Problems with the TV's picture quality may be a good indication that the fan is not working and needs to be replaced.
Unplug the Sony LCD TV. Some residual electrical discharge may still be present. To avoid electrical shock wear rubber-soled shoes.
Lay the TV face down on a soft surface. Placing the TV on a pillow, carpet or sofa will prevent damage to the LCD screen.
Remove the back panel. Use the screwdriver to remove the screws and gently lift the panel away from the TV.
Locate the cooling fan. Unscrew the cooling fan from the TV and disconnect the electrical wires that are connected to the LCD TV. Do not remove the wires from the cooling fan.
Install the new cooling fan. Mount the new fan in the exact position as the old fan. Check to see that there are no wires caught in or close to the fan blades. Replace the screws and tighten them to ensure the cooling fan does not become dislodged over time.
Remove a wire from the old fan using the pliers. Do not damage the protective plastic sheathing on the wire. Remove one wire at a time.
Connect the wire to the new fan in the same position it was located on the old fan. Secure each wire with a small amount of soldering metal. Repeat the procedure for all wires.
Replace the back panel of the Sony LCD TV. Secure the panel with the original screws.
Plug in the TV. If the fan can be heard when the TV becomes hot, it has been wired correctly.
Loss of picture can mean the fan is not operational and the fan's wiring should be checked.