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Sharp 14vk80m has sound but the picture is black..i can see the channel and volume when I adjust it..what components that failed?im a newbie in electronics please help me..

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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techman
  • 3130 Answers

SOURCE: got picture but no display...

Yes it could be the microprocessor IC or the display IC. Im not sure how the display system works as I do not have a schematic for the set. now what I have seen in the past, is that when the flyback blew out it sent a spike pulse way bigger then it should have been and blew out the display sync circuit, and that is built into the microprocessor. Also I have seen in the past, when a main componet such as a flyback transformer is replaced, there are small surface mounted componets near and around the flyback that gets unsoldered. These are ussually small surface mounted type resistors or capacitors that send a pulse to sync up the display output with the horizontal and vertical sweep, or the display would not know where to be and would run so fast along the screen that you would not see it. Check out the horizontal pulses to the micro, or like I said the micro is bad. Good Luck

Posted on Oct 09, 2006

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guly
  • 67 Answers

SOURCE: no picture but there was a sound

1.service mode before putting unit into the service mode, check that customer adjustments are in the normal mode. use the reset function in the video adjust menu to ensure customer controls are in thier proper(reset)position. 2.service number selection once in the service mode, press the channel up or channel down button on the remote transmitter or at the set . the service adjustment number will vary in increments of one,from "S01"~"S19" to "M05". select the item you wish to adjust. 3.data number selection press the volume up or down button to adjust the data number. to enter the service mode. while pressing the vol-up and ch-up buttons at once, plug the ac cord into the wall socket and switch on the main power. now the TV set is switched on and enters the service mode. to exit the service mode, shut the television off by pressing the power button.

Posted on Sep 19, 2007

likha
  • 790 Answers

SOURCE: no pictureq

maybe you have defective heater line tru the CRT board! check the heater line if have a 4.5 volts or 4.8 volts! can you see the back of picture tube!?! they lights coming out at the neck of the tube! if no light! you have defective heater supply!

Posted on Oct 16, 2007

SOURCE: Sharp LCD LC-46D64U

Try resetting the TV. Here's how to do it - Unplug the TV's power cable. Keep the Channel Down and Volume Up buttons on the TV pressed and plug the power cable back into the outlet. You will hear a click when you plug it back in if the reset is successful. Hopefully this should restore your video and audio.

Posted on Feb 06, 2008

  • 1 Answer

SOURCE: Akai pdp4273m1 has sound but no picture

I also have the akai PDP4273M1 tv with power and no picture and I looked at the power supply board inside and found 1 of the FMG26S chips blown and I am looking into replacing this to see if that does it and if not do a search for SANKEN PSC10165B M and for approx 170.00 you can get a whole new power supply for it and its easy to put in..

Posted on Oct 28, 2008

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1 Answer

Philips 32PFL3505D 32 in LCD TV How can the TV be set to factory setting?


Hello
There is no details about the factory reset of your tV in its user manual. But intvidual reset for picture, sound etc can be selected and can be reset to factory reset.

Summary of picture settings

The following picture settings can be confi gured. Depending on the

format of the picture source, some picture settings are not available.

• [Auto Picture]: Sets all picture settings to the factory default.

• [Brightness]: Adjusts the intensity and details of dark areas.

• [Contrast]: Adjusts the intensity of bright areas, keeping dark areas

unchanged.

• [Color]: Adjusts color saturation.

• [Tint]: Adjusts the color balance in an image.

• [Sharpness]: Adjusts the level of sharpness in image details.

• [Color Temperature]: To set the color temperature to [Normal],
[Warm] or [Cool].

Summary of sound settings

The following sound settings can be confi gured. Depending on the

sound source, some sound settings are not available.

• [Auto Sound]: Sets all sound settings to the factory default.

• [Equalizer]: Adjusts individual sound frequencies.

• [Virtual Surround Sound]: This selects the modes for more spatial

or surround sound reproduction.

• [Auto Volume Leveling]: Reduces sudden changes in volume, for

example, during commercials or when switching channels. Select

[On] or [Off].

• [TV Speakers]: Select [On] or [Off], or output sound to an

EasyLink compliant device. When [Speakers EasyLink] is selected,

the TV speakers are disabled and TV sound outputs to the speakers

of the compatible EasyLink compliant device. Adjust the volume
using the unit's remote control.
OK.

Mar 08, 2011 | Philips 32PFL3505D 32 in LCD TV

1 Answer

The screen on my big screen is black it still works i can hear the tv but just cant see the pictures


Hi,

If all the following apply to your set:

(1) Adjusting the brightness and seeing that video is present (just black)

(2) The TV's menu system is visible on screen even though no images are

(3) Your particular SHARP model supports picture in picture mode

Then I suspect that the problem is your TV's picture-in-picture sub-board. All external video sources & the internal tuners must pass through this board before being processed and displayed on the picture tube (even when PIP is not enabled). As far as I am aware SHARP does not provide this board as a spare part anymore, but they can be repaired at the component level if the failed component is a generally available device.

Regards

Jun 27, 2010 | Sharp 32C-240 32" TV

1 Answer

No channel control knob on Sharp Linytron: 1993-Model 1 3SB50.


This set was a massively stupid idea and requires the remote control for everything. You'll need to buy a universal remote control, which should give you the basic functions (power, volume and channel control), but might not get you access to picture or sound adjustments. I don't think this set had any special features.

Mar 26, 2010 | Televison & Video

1 Answer

Was watching TV and the picture just went black (still had sound)


eithor the flyback just craped out or the tube went
try turning up the flyback failing that call a service tech and ask for a quote
quote cose 30-50 bucks
atleast you will know forsurre if it's worth fixing

Aug 06, 2009 | Samsung SPN4235 42 in. Plasma HDTV

2 Answers

Sound but no picture


Sound like the main board may have died, but this set has some firmware upgrades that can be done as well, there also may be a problem with the LCD control board. At any rate this problem is beyond the backyard tv tech, my advise is to take it to a autherized Sharp repair shop, by doing that the shop can order these part through Sharps board exchange program and save you some money on the parts

Feb 13, 2008 | Sharp Aquos LC-32GD4U 32 in. LCD HDTV

1 Answer

Sound with no picture


the problem is in the backlight try to measure the supply.and replace the inverter.

Dec 05, 2007 | Toshiba LCDTV/DVD Player 19HLV87

1 Answer

No picture but there was a sound


1.service mode before putting unit into the service mode, check that customer adjustments are in the normal mode. use the reset function in the video adjust menu to ensure customer controls are in thier proper(reset)position. 2.service number selection once in the service mode, press the channel up or channel down button on the remote transmitter or at the set . the service adjustment number will vary in increments of one,from "S01"~"S19" to "M05". select the item you wish to adjust. 3.data number selection press the volume up or down button to adjust the data number. to enter the service mode. while pressing the vol-up and ch-up buttons at once, plug the ac cord into the wall socket and switch on the main power. now the TV set is switched on and enters the service mode. to exit the service mode, shut the television off by pressing the power button.

Sep 19, 2007 | Sharp 27J-S100 TV

1 Answer

SOUND BUT NO PICTURE


I HAVE A PROBLEM ON SHARP 21 INCHES THE PROBLEM IS NO VIDEO BUT THERE WAS A SOUND IF I PUSH THE CHANNEL UP AND DOWN WILL DISPLAY OR VOLUME OK BUT NO DISPLAY BLACK SREEN

Aug 26, 2007 | Sony KV-36XBR400 36" TV

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