LCD TV cooling Fan possible ?

[Sevenqi]

I repaired a 32" LG LCD TV, the backlight was off about 10 minutes watching, but sound was still good. I thought it should be the backlight inverter or CCFL lamps problem, but when I took out the panel and check all the lamps are in very good condition, the inverter transformers are not shorted.

So I turn on the TV without put back the cover, it's one hour and it still working, When I touched the mental holding the lamps, it's very hot, the heat was from the lamps, so I think the backlight off is because of overheat.

I'm think to add a fan on the back near the power supply, but I need to control the fan's on/off, I would like to use a 12v fan and connec to the 12V output from the power supply, I'm afraid if this is good idea to add more loads to the power supply?

May be someone in this forum did this before, please advice.

[tom66]

Re: LCD TV cooling Fan possible ?

I would expect all you are doing is delaying the inevitable.

The TV is probably overheating but this is only because it has been damaged by this heat over time. As it gets hotter it fails. But it didn't originally. In a year's time it might cut out in a minute instead. You really need to find and replace the failing parts.

I can't see how adding a fan to the set is going to overload the power supply.