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Vizio 32" tv led why some channels scrambled

Why some channels scramble we have cable tv, have replaced the main power board.

Posted by Anonymous on

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gemagm

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If not the cable source then the MAIN pcb (not power pcb) controls all tuning. If you're using a cable box & some channels good/some channels scrambled, then is a cable issue.

Posted on Sep 09, 2014

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Anonymous

SOURCE: Vizio P42HDTV Power on Diagnosis

Please check the U29 8 pin little surface mount mosfet it has this letters > FDS4935 > > In this part inputs 13.2 volts which is ok for the near 12 vdc but it > outputs 1.250 vdc i am 100% sure that this is all the problem > > check it out, and tell me if you´re agree with me > > On this output pin it feeds the audio Ic, the 7809 and the tuner side board > which needs de 12vdc too and its getting only the 5vdc part > > what do ya think?? > > Richard

Posted on Apr 13, 2008

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welcomejee

Shahid Electronics

  • 10594 Answers

SOURCE: screen scrambles into various colors and freezes

TV requires main board replacement because problem seems in video processing section.
Main board is available at Shop Jimmy on reasonable price. (click shop jimmy link to see an image of main board)

Posted on Jun 12, 2009

Jack South

  • 195 Answers

SOURCE: olevia 437-s11

Most likely the CCFL inverter has been the problem all along....

Posted on Oct 10, 2009

Anonymous

  • 1 Answer

SOURCE: my tv is saying scrambled video is there anything

it means its a porn channel

Posted on Dec 28, 2010

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1 Answer

Why does TV continue to require a channel scan after running a scan?


Main system control memory IC fault. This IC can be located at its main board; and is replaceable. Contact any service technician.
http://electronicshelponline.blogspot.com/

Sep 15, 2014 | Televison & Video

1 Answer

Signal Problem


Hi,

When the sound is working and the picture is not it indicates the main power supplies are working but the picture supply is not. The picture supply that powers the projection tubes is a high voltage generator and is very expensive to repair. Not even most tv techs now how to troubleshoot them. So, I cannot recommend you repair it yourself unless you are a trained high voltage tech.

The cost of repair - my wild guess - would be around $300. However, the real cost can only be determined by someone who can make an accurate diagnosis - which will require a hands-on approach the problem.

If you have any other problem please ask me..
Goodluck,
Please don't forget to rate me as fixya..

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1 Answer

Unscramble channels


Fault with main board. Damaged component/s at it. Contact any service technician; or the authorized service center. 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/ . In most cases, the main board might have to be replaced.

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CHECK THE CONNECTOR INPUT SELECTOR CHANNEL THAT IS NOT DAMAGED CHECK THE CABLE CONNECTOR COAXIAL. AGAIN MAKE CHANNEL SCAN., BUT GET NO TUNE CHANNEL. SURE THAT OTHER VIDEO INPUTS., HDMI & USB OPERATING NORMALLY, IF THIS IS OK., MUST REPLACE CHANNEL SELECTOR OR LAST CASE NOT FIND REPLACEMENT., REPLACE THE MAIN BOARD., IN SOME CASES THE CHANNEL SELECTOR COMES AS PART OF THE PRINTED CIRCUIT., THEREFORE TO REPLACE THE MAIN BOARD.

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certain tvs have automatic tuners that scramble channels, do a reset on the tv and scan your tv channels again

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Sony videoscope xbr


would think you need to replace the cable board etc. the signal is not getting in and out right. can also be a fault on the power board giving the wrong volts so would check this to. it will tell you on the board what volts is supposed to be. the 5v and 12v should be spot on other volts will vary a little. also check the capacitors for the caps to be bowed up and a brown/ yellow gunk around them and under the board this can be a sign they are failing.

Feb 25, 2014 | Televison & Video

1 Answer

Why has some of my channels gone and saying scrambled channel


That is how the channels are broadcast - reset the cable box and make sure your TV is digital ready to receive the signals. Some channels are just scrambled and you can't receive them. Go through your set up with your remote to channel search but some will still be scrambled because they are closed circuit or just for some broadcasts.

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Change the 1000uf @16v capacitors on the FMT board that should solve your problem. You will most likely found that they have swelled. Let me know if you need further info.

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1 Answer

No signal on TV, black screen


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main digital board.

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