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The TV say Check Fan No. 2 and then shuts down

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The fan connection of the circuit board is loose or crack or cold solder joint,that is the cause of the message or the fan is defected already because of the overheating,change it with a new one.Before you replaced the fan try to reheat or resolder sometimes cold solder is the culprit.
Cold solder issues - each component is soldered into small holes on the printed circuit board which in turn connects said component to the other components. Due to time, heat, use, some solder joints would be cracked or loose. It is possible that the cold solder is still minimally connected (hanging by a thread). When the TV turns on heat would be generated which would be sufficient to further loosen up the solder joint to the point it no longer provides electrical contact. Jarring the unit creates movement inside enough to re establish the contact, sometime good enough sometimes not enough.

Again, since the unit still operates (sometimes) then it is highly probable that there are no defective components. As you have surmised, it is possibly a loose connection, solder joints are "connections" except that molten soldering lead is used to attach/connect the component to the board, "loose connection" in this sense is equal to "cold solder".

Again on the assumption of no defective parts, then seeking a more experienced buddy for the soldering might be to your advantage. This is of course in addition to the possible electrical hazards when repairing....

Good luck:

Don't forget to rate;

Posted on Jul 23, 2008

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Greetings,

Locate the vents where hot air comes out (on the sides and at the back of the unit) and make sure it's not blocked.

Keep us posted and thank you for using our service.
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Posted on Jul 23, 2008

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Can you provide the brand and model number?

Posted on Jul 23, 2008

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