Hitachi C21-FL21F 21" TV Logo

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Alan Whyte Posted on Apr 11, 2006
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Television fault My television has on a couple of occasions given me a green colour cast over the picture but after a short while has returned to the proper colour. It has now done this again but has not returned to the proper colour, does this indicate that there is a fault with one of the colour guns or could it be as simple as a dried out capacitor somewhere.

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  • Master 3,130 Answers
  • Posted on Apr 11, 2006
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Joined: Mar 22, 2006
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On this set its a common thing to have an intermittant connection on the crt driver board. That would be on the socket itself or on the driver transistor. Also could be a driver problem as one of the drives comming from the video jungle IC could be bad or even in some cases could be the picture tube. Hope this helps.

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I have a 32inches LCD tv,when I ON. it will be flashing different colour like red follow by blue and also green colour with no picture and sound.please what can be the fault?

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
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Hi Babu

Check all the solder terminals at the CRT base card. If any of it get loose at the solder terminals, this kind of fault can happen. It is very difficult to detect a dry solder terminal, as it will be microscopically small. can\'t be seen by naked eye. To this type of fault, what we technicians do is, to resolder all the suspected solder terminals. In 90% of this kind of faults, get rectified by this. You too can try this. Be sure not to short circuit adjacent solder terminals to make a short circuit by any solder bridge short, when re-soldering. Electro help
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If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.
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Possible that the green gun has failed or there is fault in the drive to the green gun or a circuit issue in the drive.
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A good TV repair shop should be able to repair this but given the current price of flat panel TV's you might want to think about scrapping it.
I was a little confused about your description of the fault, one colour disappearing is in a very different area of fault from all colour disappearing. Does it flash into correct colour momentarily if you fine tune it? Is the picture as far as you can tell black and white or does it have a strong colour cast on it where everything is for example reddy or bluish etc?
I hope I have been of help but please do not hesitate to ask if you have any further questions.
I appreciate your vote if you appreciate my reply.
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Bluish green tint to television picture

Find out what board and circuit is responsible for the color and you have your answer.
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