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When I switch my TV on,the green light comes on but it goes off after 2 seconds and switches off, Why?

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Without any brand name or model number, you can only expect an equally 'generic' reply. If you are hoping for a detailed response, always include those items.

This is a typical sign of a power supply failure or, if it is a standard (CRT) TV, the high voltage (horizontal oscillator) circuit may have failed. If it is the latter failure, it may be caused by a failed flyback transformer or of the transistor that drives it. If it is a conventional (CRT) TV, the flyback may not be available any more and if not, you may have trouble finding anyone competent to work on these sets since we are all dying out.

Posted on Jan 30, 2010

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Toshiba regza 32av554d


There is a short circuit with any of the component/s at its main board. Contact any service technician. do not switch the set ON again and again. It might make things worse. If you wish to get some details, check the site linked here. http://electronicshelponline.blogspot.com/ Pull up older posts. Check the site in 'Mosaic' view. It will make search easy.

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Mitsubishi hdtv


NOT A GOOD IDEA AT ALL!

You likely now have one of two things happening:

1. Green power light constantly blinks and will not stop(should blink for 70 seconds and go out).

2. Green power light comes on and a few seconds later goes off.

Which do you have?

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Older medallion 55" 1080...switched itself


MOST OF THESE SETS HAVE A SELF DIAGNOSTIC:

UNPLUG TV AND THEN PLUG BACK IN---TURN ON---GREEN POWER LIGHT COMES ONFOR A MOMENT AND GOES OFF.

PRESS AND HOLD "input" and "menu"buttons on front of tv for at least 5 seconds and then release both together.


Watch for power light to blink in a sequence:

1 blink-then 2 blinks-------no error

2 blink-then 1 blink-------X-ray protection

2 blink-then 2 blink-------SHORT PROTECTION*******

2 blink-then 3 blink---------deflection circuit problem

2 blink-then 4 blink---------vertical circuit problem


******2, then 2 is most common---usually means one of the fuses that protectthe Convergence IC or IC's is blown---set will detect no voltage to convergenceIC and shut down.


SET WILL REPEAT BLINK ERROR CODE UP TO 5 TIMES ANDTHEN TO GET IT TO REPEAT MORE YOUHAVE TO UNPLUG SET AND TRY TO TURN ON AGAIN.


IF IT IS 2 AND THEN 2---USUALLY
CONVERGENCE CIRCUIT PROBLEM

let me know what you find--hope that you find 2 blinks, a pause and twoblinks--this is the most common and easiest to fix.
SD TECH

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1 Answer

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Maybe you could try the auto-set. Found this using google:
Auto code search

1. switch on the TV and select a channel eg. Bbc1 on the TV itself
2. press the appropriate device button eg. TV
3. press the green SET button for approx 5 seconds until the red light comes on.
4. release the green SET button and point the remote at the device to be controlled, the remote will emit a test signal about every 2 seconds.
5. when the TV switches itself off briefly press the green SET button to store the code found.
6. when the red light goes out the search is ended.
7. try out the remote if it works follow the same steps to set it to other devices eg. DVD. If it does not work follow the steps again.
cover other remote sensors on other devices when setting the remote.

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1 Answer

Stays on for 2 seconds and switches off


A 2-2 code on that unit means over current shutdown. 95% of the time that code indicates defective convergence output IC's.

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1 Answer

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Auto code search

1. switch on the TV and select a channel eg. Bbc1 on the TV itself
2. press the appropriate device button eg. TV
3. press the green SET button for approx 5 seconds until the red light comes on.
4. release the green SET button and point the remote at the device to be controlled, the remote will emit a test signal about every 2 seconds.
5. when the TV switches itself off briefly press the green SET button to store the code found.
6. when the red light goes out the search is ended.
7. try out the remote if it works follow the same steps to set it to other devices eg. DVD. If it does not work follow the steps again.
cover other remote sensors on other devices when setting the remote.

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1 Answer

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Dear smmmobil,
The problem lies with the SMPS (switch mode power supply ) of your TV. The smps board needs to be replaced.

ramesh22

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