Question about Sharp 25R-S100 25" TV

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Sharp 32'' tv -no raster showing channel numbers only

When tv is powered on tv only displaying channel number and sound -no raster

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Since you have sound and display it's not the hivoltage. You're electron guns are not being turned on. Most likely the IC which biases the guns or the IC which contains the biasing resistors.

Posted on Mar 09, 2009

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When tv is powered on tv only displaying channel number and sound -no raster. using video mode displays are ok. sound is also ok


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
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If there is no video signal input, this kind of fault can occur. An abnormal "Screen" voltage too can be the cause. If video processor IC or the tuner is faulty, this kind of fault can occur too. You should check all this. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter".
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Sharp tv #27sc26d no picture have sound


There is a voltage loss in the main board. It will be best to contact any experienced service technician, as the work is a skilled one.

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1 Answer

Keep always blinking the green lights indicator ones i plug the power cord. no video, no raster on the screen.


The green lights on a Sharp television indicate a problem. The number of blinks is a code. The television has gone into a coma in order to protect itself. You can force this television on by doing this. Unplug the television. Hold down the vol+ and channel down button on the television and while holding them down still plug the television in. This is a temporary way to view the television but the problem will get worse if not repaired. Should the television power on this way unplug it when you want to turn it off without pressing the power button at all.

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While watching, TV made a sharp bang sound. Sound still good, channels can be changed, but no screen, no raster


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1 Answer

Channel displaying on Samsung 32"LCD TV


Most remote controls have a "display" button. Pressing that is what gets that channel number on the screen. Try pressing it again and the display should turn off. On some brands the display may cycle through various combinations (channel number only, channell and time, etc.) before it goes away, so it may take more than one press of the button.

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3 Answers

No raster, No sound, No channel number


wepu, Buddy it sounds like you got a power supply problem. As you say the picture is all blue?? With no video or sound and the fact that the channel display is out is the first indication that i would guess this. Do you still have the owners manual that you got when you first got the set? Good, cause thats the only place i can think of where to look in case of service over in your part of the world as I did try!! Man I tryed but to no avail. No one has heard of this model but that dosent mean that it dos'ent exsit!.. If your a tech or know your way around solid state circuitry then you should have no problem finding the fault once you get a service manual from the service location in your owners manual. Now if your not a tech and a handy man ?? If I were you I wouldnt mess with the tv as theres over 25000 volts inside the set and i've seen it make a grown man cry. Man dont attempt the repair or troubleshooting if you dont have the right or proper tools and equipment!!! Good Luck

May 26, 2006 | Philips 21PT4475 TV

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