TV power problem, relay clicks, only turns on when you hit it

On 29 May 2006 12:24:20 -0700, snipped-for-privacy@gmail.com put finger to keyboard and composed:

No kidding. :-)

It sounds like the set may have a dry joint. I suggest you reflow all suspect solder joints before you make the problem worse.

It is usually rectangular with 4 pins. It may have a transparent case through which you would see the coil and contacts.

- Franc Zabkar

snipped-for-privacy@gmail.com ha escrito:

you will need to resolder the power supply and high voltage components where heating and cooling cycles have led to the solder becoing cracked. if in doubt, have a tech do this simple and hopefully inexpensive work, or you could end up trashing the set.

-B.

With the back off the set, using a mirror, turn on the set using the Remote !, Listen for the Relay to click ON !! and OFF. Should be close to the back of the Set.

My guess is the relay is about to give up the ghost entirely, ie I suspect the relay contacts are badly cooked.

This should come as no surprise after all, I would guess the tiny contacts have switched ~ 500 watts about 20,000 times, over 15 years of use.

The QD. quick and dirty, is to permanently solder the appropriate traces on the motherboard to leave the set ON permanently and turn OFF by un-plugging the Set, or use a switched Power-bar. The final cure will then be to replace it with a BIG SCREEN TV (HD), partially paid for by forgoing the cost of replacing the Relay.

Yukio YANO

A wild guess.... to be sure!

-- Best Regards, Daniel Sofie Electronics Supply & Repair

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Less wild than the two previous posters call for COLD SOLDER JOINTS !, I would even bet a case of beer on it. We could get the O/P to umpire the call. Yukio

I traced the Relay on another TV with the same symptoms same way, was surprised by how small it was. These contacts are supposed to last a hundred thousand cycles !