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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.

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  • Felipe Dologan
    Felipe Dologan Dec 22, 2014

    the model is 20v-j50m

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  • Sharp Master
  • 74,377 Answers

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.
http://electronicshelponline.blogspot.com/

Posted on Dec 11, 2014

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Posted on Jan 02, 2017

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SOURCE: sharp 32'' tv -no raster showing channel numbers only

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

gopakumarg43
  • 74377 Answers

SOURCE: sony trinitron 21in. tv-no raster solution

What is the exact model number?

Posted on Jun 08, 2012

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How to fix 14v-s100 sharp crt tv no raster only channel and volume display on screen


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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1 Answer

LEDTV24FHDF


You should be able to get OTA (over the air broadcast) just make sure you have an antenna plugged in and that the tuner is set to AIR.

Setting the Tuner Mode
If you are using a device that is connected to the RF input, such
as an external antenna or cable TV connection, you must set the
tuner mode.
1. Press the MENU button on the remote. The on-screen menu is
displayed.
2. Use the Arrow buttons on the remote to highlight the
Settings icon and press OK. The Settings menu is displayed.
3. Highlight Tuner and press OK. The Tuner Mode menu is
displayed.
4. Highlight Antenna or Cable and press OK.
5. Press the EXIT button on the remote.
Scanning for Channels
Before the TV can detect and display channels and their
associated information, you must scan for channels. A channel
scan may also be necessary when the TV has been moved to an
area where different free-to-air broadcast television channels are
available.
1. From the Tuner Settings menu,
highlight Auto Channel Scan.
The auto channel scan begins.
2. Wait until the channel scan is
100% complete. Highlight Done
and press OK.
3. Press the EXIT button on the
remote.

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1 Answer

I was given a mitsubishi tv but the previous owner had a password lock on it. Is there any way to access the tv by rebooting or something in order to use the tv?


1. Press the Mode button until the LOCK CODE display appears.
2. Enter the 4-digit code using the CHANNEL SELECTOR buttons.
3. Press the CANCEL button to cancel the previously locked channel. The LOCK CODE number display flashes.
4. To exit the CHANNEL LOCK mode, press the MODE button until only the Time and Channel display appear.

Secret text if the code is forgotten!
1. Press the Mode button until the LOCK CODE display appears.
2. Press Channel Number "9" and "QV" simultaneously. Knowledge of this procedure defeats the channel lock system.

Nov 12, 2009 | Televison & Video

1 Answer

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


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.

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Tv tcl-14175 no sound on channels but ok on audio video mode


Hi

The first problem was always standby mode.... get back the original eprom IC 24CO8WP in to the PCB, then find the original remote control of you TCL Tv tcl-14175 then you power On In the Remote control while your TV is in Standby mode! then you see your tv is going ON... Because your unit is in Child lock Mode....

thanks!

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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

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1 Answer

No raster, No sound


Your problem discription is not very detailed but certainly it sounds like the first place to look would be at the fuses if the set is completely dead. Good luck.

May 26, 2006 | Philips 21PT4475 TV

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