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TV runs for a limited time, then goes to standby

Please help with my LG flat screen TV, model 29fx5ble-tg 74cm. It runs for a period of time then goes to standby. I've checked the power supply and line stage for dry joints and found none. I tested all my diodes and transistors, and I am still stuck with the same problem.

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  • LG Master
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Is the fan running ,if the fan has dirt on it clean it off with contact cleaner.Set will stop playing if fan stops.

Posted on Nov 28, 2008

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TV runs for a limited time, then goes to standby


Hi and welcome to FixYa,

Appreciate the direct "Ask Me".

The LG 29FX5BLE appears to be a Korean domestic model. There are a number of possible causes for the auto shutdown as you have described. Assuming that this is a conventional single CRT TV, lets start with the vertical amplifier IC. This would be very near the 4 wires the goes to the yoke. This IC would have an aluminum heatsink and could be anywhere from 7 to 15 pins single inline package. The have been known to develop cold solder especially the Vcc pin. It may also be worth your while to trace the Vert B+ line to the resistor diode from the secondary of the FBT.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

Nov 28, 2008 | Televison & Video

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