Tv went dead while viewing, will not power back up
Was watching tv and tv acted like power went out. Picture went black and no power. Shortly after, a chirping sound could be heard. chirp...chirp...chirp...etc. Power will not come back up even after unplugging for a time. Any suggestions on what is wrong?? Thanks.
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Re: tv went dead while viewing, will not power back up
You have a short somewhere in the load for the power supply. Probably the horizontal output transistor and the flyback transformer.
You need to have it checked out by a tech.
You may want to get an estimate.
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Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.
s the audio coming from the TV's internal speakers, or from an external
sound system? In the 169 series chassis, if the power supply caps or
secondary rectifier are bad, or if the high voltage splitter has
shorted inside, the set will not run and there will be no picture or
sound from the TV. If the picture is completely black but the TV still
has audio, press the menu button and see if the menu comes up on the
screen. If the menu is there, check your cables on the back of the TV.
If you are using a cable or satellite box, the box could be bad or the
video wire could be bad or loose. If you do not get the on-screen menu,
then I would guess that the solder joint next to the flyback
transformer that sends filament (heater) voltage up to the picture
tubes has cracked, or the low value resistor in the heater circuit has
opened up. If that is the case, have the set serviced by a qualified
tech familiar with the 169 series chassis.
It's obvious that the power supply failed. The most common parts in a power supply are a thermistor or a voltage rectifier, possibly even a voltage regulator. diodes or resistors can act as fuses too. A ringing sound can come from a fixed coil that isn't kept still with enough epoxy. Hope this helps.
Tv now turn on,tv have power LED light indicator flashes?Tries tv unplug,replug it back like an hour later,the tv now,should resetting itself back to the factory setting.The tv should work now.Not,than the power supply board is dead.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
You have bad convergence IC's.. If your not experienced in troubleshooting electronics or soldering, you should have a trained tech take a gander at the set. Its not worth risking life and limb to save a few bucks, Good Luck