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My sharp 20inch cinemaborg crt tv no picture but on display menu and sound are all good i try to resolder all parts or components in crt but problem still exist..please help!

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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techman
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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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SOURCE: Please help me fix this benq monitor

There are many posts that have solved this. Check em out

Posted on Oct 23, 2008

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SOURCE: i have ps2 slim connect with crt monitor through tv tuner box but

have you tried hooking the tv cords from the ps2 directly to the tv?

Posted on Mar 29, 2009

  • 150 Answers

SOURCE: tv not picture not sound

Is it varying the tuning voltage from 0v - 32v as it searches , if not then jungle/micro is faulty or check between tuner and micro/jungle

Posted on May 13, 2009

dsacco86
  • 1077 Answers

SOURCE: My Sharp TV will only hear sound. No picture or images even from the tv menu setup option. Model# LC-19SB25U. About 1.5 yrs old. Converter box ok.

In most cases, you can reset the TV by leaving it unplugged for 30mins.
If this doesn't work, I believe the circuit board that supplies power to the screen maybe bad. They call this board a backlight inverter board. It would most likely cost more to repair than replace the TV .

Posted on May 27, 2009

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1 Answer

Picture goes dark but there is sound


There are many cause of dark picture symptom of standard television.First thing to do is try to adjust the screen control adjustment located at the flyback at the lower parts.There are two flyback adjustment the focus and screen adjustment.The upper level is focus and the lower is screen control. If check also the CRT socket board section.This CRT board is compose of high voltage terminal coming from the high voltage supply.Check if there's a cold solder in CRT socket terminal and other parts around the CRT socket.The heater supply,the RGB cathode supply,and the screen supply are the supply of picture tube to be lights up.So try to resolder those parts of the TV.Avoid short circuit in the PCB board.Hope it will help you.Thanks..

Aug 29, 2011 | Sharp Televison & Video

1 Answer

T.v have no picture but it had a sound


no pic but hv sound? try to resolder resistors legs on crt board. or dirty crt socket. desolder d socket & see d dirt and replace

Jul 27, 2011 | Sharp 27C-240 27" 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

Curtis mathis tv turn tv on some times turns on just fine some times just sound no picture


open the enclosure of your tv..using a soldering iron resolder the CRT board.A CRT board is a small board attache to picture tube resolder all the components there..good luck!

please rate my help tnx.

Jun 04, 2010 | Televison & Video

1 Answer

Sony TV shuts off automatically


1.Check first if the shutdown of your tv follows a certain period of time. Example after using it within 12 hours it automatically shut down. If so the the matter is only on settings of your tv.
2.But if your tv shut down at an irregular time the problem is in your board. In this case if your tv still work but still shutting down automatically its better not to use it so that their will be broader damage.
3.The most common defect on this case is loss contact of components due heat and mechanical undergone during the usage of the tv. If you know how to resolder board, try to resolder the components specially those who are showing loss contact. You can recognize it because a good solder one has shinny and no round like on the soldered surface.Try also to resolder important parts such as IC's and transistors. note : a good resolder needs to be done in order to avoid problems and damage.
4.Another possible cause is the tack switch for channels,menu,power and etc. You can remedy it by spraying it a contact cleaner.
5.If the problem still going even after the procedure its better to bring it on reliable and trusted service center.

Jul 11, 2009 | Sony Televison & Video

2 Answers

No picture


check all resistors right in crt board & resolder picture tube connection. good luck!

Dec 04, 2007 | Sylvania SRT2232S 32" TV

1 Answer

Has sound but no picture


That could be a dry soler joint, most probably as you said it used to work when you tap. Now the joint might have gone worse. Check the pcb for dry joints and resolder them. Good luck.

Nov 26, 2007 | Sharp 27H-S60 TV

1 Answer

Occasionally picture and sound out of order


have a tech resolder the circuit board it has an intermittent problem,which means that some of the components on the board has loose connections.causing the tv to operate sometimes.good luck.

Jul 01, 2007 | Samsung DLP HL-P5663W 56" TV

4 Answers

RCA F32649 sound but no picture


This usually a problem on/near the horizontal section of the TV board caused by solder that losses its contact thats why you need to bump it sometimes for the picture to come out. To remedy this just try to resolder any parts that you suspect seems to loose especially in the part where the components tends to get hot when operating, this usually are the horizontal section or the power supply section which is very common.

Apr 10, 2006 | RCA F32649 32" TV

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