Question about Prima C2012 TV

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Prima 32 Intermitant color, when the set is turned on the colour goes from normal to no colour, ie. red is seen as blue, and the whole picture has a blue tone.

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What causes color to appear flouresent

Video output section circuit have the fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.

Oct 15, 2014 | Sony FD Trinitron WEGA KV-32FS120 32" TV

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I keep losing th red color on my screen, what is going on

Y sus problem with your TV. You need a basic tv knowledges to repair it yourselves. Regards

Feb 26, 2011 | Sansui 32" TV

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Fixing the color-no reds

There is some loose solderings or bad solderings on the picture tube base card components in your TV. That card contains the Red, Blue and Green outputs. If the other two colours are getting normal, it may be surely either a loose in the red output transitor leads slodering, or red output transistor itself. You just open your TV, and resolder most of the suspected points, that ma have loose, by applying a little more solder. Never short circuit beteween solder points while soldring. In most cased this may be the probelm. If you want anymore assistance, feel free to contact me through Fixya. OK.

Dec 20, 2010 | Sansui 32" TV

1 Answer

My sony tv KV-19BMR1 color is my problem more blue?


Advance of any one colour, Red-Green or Blue, will be due to the some fault in the video output section in your Sony TV. When the related colour cathode of the picture tube gest improper voltages, say low voltage than normal it should get, then occures this problem. As you know, all colour TVs have three electron guns, otherwise called as cathodes, are there inside the neck of the picture tube. One emits blue, an other emits green and an other emits red. You are seeing the combinations of these three colours displayed in different ratios in your picture tube when a picture is being viewed. Keep this in mind and follow please.
All the above said three cathodes of the picture tube has some voltages applied to it to emit predetermined quantity of electrons from them, which determines the intensity of that colour. Now your TV displays blue in excess means, the blue cathode of the picture tube in your tv has a low voltage with respect to the other two have. Cathodes are negatively biased, that is as its voltage goes low it will emit more and more electrons, which will cause an abnormal excess colour of that cathode.
You just open your TVs back cover, without damaging any other components inside, after unplughint it from power wall socket. As you open the back cover, you will be first exposed to a small rectangular board, plunged into the neck of the picture tube, known as base card. It is pluged into it with the help of a socket, we call it as picture tube base socket, and it can be pluge out from it by applying a gentle pull backwards. Never make a right or left shake when you do this as it may damage the picture tubes pins or even break it.
Give power to the TV and keep switched it on and see the screen. Keep the colour control to zero position, and brightness to at about 30%, and contrast to 50%. At this condition, you shuld get a clear blacke and white picture. In your case now, you only get a picture with a blue shade. Locate the "blue cutoff control' if any fitted on the base card, [as latest sets have not], and it will be marked as "b-cut" usually. If it is there, with help of a plastic screw driver rate it just a little counter clokwise or clockwise, while observeing the picture, whethere it gets any change in colour or not. If there is no colour change, the colour output transistor related to blue cathode should me changed. It may be leaky.
If there is no color cut-off control is seen, you won't have this option. If so check the voltages of the three above said cathodes, and it can be taken with a multimeter set to 400VDC or above. it should be almost equal th each other, except a voltage difference of 3 to 4vDC is allowable. In your case the blue voltage will be more less than thi tolerence. You can take this voltage by touching the meter probe to pin number "3"_blue, pin number "4'_green and pin number "6"_red. Usually sont tubes have this kind of pin cofugurations. If the blue cathode voltage is seen abnormal with respect to the other two, replace video output transistor related to it. Thsi transistor also can be located in the base card describe earlier. Ok
If you have any doubts and difficulty, inform to Fixya, and they will gvie me alerts.
Keep every precations before opening the back cover. Keep children away from you and never allow them even stand beside you. Let an adult to be beside you while you do this work. Keep the TV pluged out from the wall power socket every time before you touch any of its inside components.
Be confident and patience. If you have some knowledge in electronics, you can do it by yoursef. If not, go for an experienced service personal. I thinks tha you yoursef will do and you can. Ok

Oct 22, 2010 | Sony Televison & Video

1 Answer

Toshiba 32a43 32' picture garbled mess

If you can get the tv to display the blue blackground(usually happens when there is no antenna or cable feed to tv) check to see if the whole screen is a solid blue, if it shows discolored areas around the screen then you might have to "demag" the screen. See if you can rent a demad coil from a tv shop and with tv on turn the coil in circular movements all over the front of screen till blue is solid.good luck!

Aug 03, 2009 | Toshiba 32A43 32" TV

1 Answer

Intermitant color bursts of red, green, purple


for the color problem,most likely you do have problem with loose contact of components from C-board ( small board connected at the back of CRT "picture tube" which drives every color and size of the screen)if you have knowledge with soldering electronic component parts, resolder this board and also check main board for possible loose contact.


Feb 04, 2009 | Sony FD Trinitron WEGA KV-32FS120 32" TV

2 Answers

LC-23Y25 Problem with turning on power?

so i had the same problem. red light came on, but no blue light or anything on the screen. it turns out that there were some capaciters blown on the circuit power board. unless you have a good understanding of circuit boards, its not a quick fix. but for someone who knows their electronics, its not too hard, and its not expensive to fix, unless you bring it into a store. but the supplies needed arent expensive. good luck

Nov 09, 2008 | Prima C2012 TV

1 Answer

No sound or picture on my prima plasma tv


Sep 30, 2008 | Prima CV2011 TV

1 Answer


The picture tube of the tv has 3 color in CRT Red, Green, Blue. The red cathodeof tv set has no function, its either the resistor become higt resistance, that why u need a repairman to replace it.

Apr 10, 2008 | Televison & Video

3 Answers

Picture color

have JVC AV-32F702 TV. It's picture color is very red. unable to adjust colors through menu. Channel numbers are also in red now instead of normal green. any suggestion? please check red color cathode circuit 1 check red output from ic to red cathode ckt 2 check voltage on r output ckt& ic or tr. 3 check loose contact in red cathode ckt 4 check crt base for loose. 5 loose connector 6 chroma ic thanks

Sep 09, 2007 | JVC AV-32F702 32" TV

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