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My sansui tv (crt type)showing only blue screen in both AV and RF mode. What will be the problem? How to rectify?

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  • Televison & ... Master
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If there is no signal this type of screen will be displayed.

Posted on Apr 30, 2013

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6ya6ya
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Posted on Jan 02, 2017

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jingjao
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SOURCE: blue screen

the problem of ur tv is tuner,try to solder the tuner

Posted on Sep 28, 2008

SOURCE: JVC 27" CRT TV AV-27BP3 display shows single horizontal line

I have a similar problem on my CRT computer monitor (AcerView 76c). It is an old screen and I think it is just at the end of its life, much like your TV. Having some background in physics, I would be pretty sure that the problem is with the cathode ray tube's vertical deflection system. The horizontal deflection electrodes are working while the vertical one is not. This results in a display of a single horizontal line (or in my case, a few superimposed) in the centre of the screen. Where both X and Y (horizontal and vertical) deflectors fail then the electron gun firing would result in a single bright spot in the dead-centre of the screen.

So really, we have no choice but to move on and buy a new set as repair is probably just as, if not more, expensive than replacement with a new device. Seeing as your post was in 2007, I hope you managed to solve the problem.

Best wishes,
SZ (Sydney, AUS)

Posted on Oct 05, 2008

  • 1 Answer

SOURCE: sansui pure flat CRT model SAN 5452 need to

by myself trial and error

Posted on Jun 22, 2009

  • 541 Answers

SOURCE: LG CRT TV Problem

It sounds like your picture tube is either shorted at the blue gun or there is a blue drive problem. The blue driver transistor can short and cause the same problem. If it has little fine white lines as well, most likely it is the tube. Thanks for using fixya.

Posted on Nov 11, 2009

gopakumarg43
  • 74198 Answers

SOURCE: i have sansui 19"TV. the problem is TV mode is not working.

Check its main power regulator section circuits for any defective components. If you are not well experienced, it will be dangerous to touch these part of the circuit.

Posted on Nov 23, 2012

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1 Answer

My sansui sv 2102 is ok but not going av mode


Hi JP,
Kindly check the input of your TV by pressing "INPUT", "SOURCE" or "TV/VIDEO" and you should have a list of input including "AV". Hope it helps.

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Hi ,
Check problem is in AV mode only or both AV and RF
If both mode problem is there follow the bellow
Other wise problem May RCA cable (AV cable)

I f you are able to open TV check speaker using a Multimeter (Tv should be OFF) continuity mode,is it shows 2 ohms or below speaker is ok, problem may be audio section of your TV.

Thank you

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Hi ,
Check problem is in AV mode only or both AV and RF
If both mode problem is there follow the bellow
Other wise problem May RCA cable (AV cable)

I f you are able to open TV check speaker using a Multimeter (Tv should be OFF) continuity mode,is it shows 2 ohms or below speaker is ok, problem may be audio section of your TV.

Thank you

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Service mode adjust


If you wish to get more details about how to enter, adjust and exit the service mode, check this link. http://electronicshelponline.blogspot.com/
Pull up previous posts by its left sidebar, or type in the brand name and model number to of your set, to its search box, and press 'Enter' or view it in Mosaic / Timeslide option.

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EHT arcing takes place. Never switch the TV on, until this fault has been rectified. Doing so, will make too many other faults to occur. Contact any service technician.

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i need more info?
The video1 is the input channel ,the auto is the sound and video system the tv uses to identify the signal(you have a multi system tv) {multi system (pal,ntsc,secam etc) if it is in auto mode you dont need to worry about it , the tv wil identify the system automaticaly and set the apropriate setings by itself.
>>>>>>
You could press av on tv or on remote to switch between av1 /av2 /tv program etc, make sure the ant / dvd / cable etc is conected and on while selecting / pressing av button.
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In short your tv has a problem on the AV connection, RF using coaxial cable is working okay.
get the tv to the w/shop, let him check the AV panel and AV processing IC.

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the problem of ur tv is tuner,try to solder the tuner

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