Question about Bush Televison & Video

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Why does my Bush LED24970 DVDFHD television seem to seize up for a few seconds soon after being switched on. The picture goes pixellated and the sound disappears and then it all comes back on again. It has always done this since I purchased it in 2012. I have recently re-tuned it but that has made no difference.

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  • Christine Wilks Jan 22, 2013

    Further to my earlier question. Is this a serious problem which might need repairs at some stage? If so perhaps I should take the set back to the retailer and ask for another one while it's still under guarantee. Unless all these models do this - but I need someone else with the problem to confirm if this is the case.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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premtech
  • 934 Answers

SOURCE: picture limited to a single pixel horizontal line, sound fine

This is actuall quite a simple problem... What you have explained here is a loss of vertical deflection. By the symptoms you described, working now and not working it's most likely the the vertical IC an LA7847-E has probably become ring-cracked at the point where the pins are soldered to the pc board. Depending on how long it has been allowed to arc the IC may have failed also, but they are not terribly expensive or difficult to repair - at least not here in the shop. The main board has to be removed. Locate the vertical IC - it will be mounted to a metal heat sink and the IC will be stamped LA7847. Then turn the board over and inspect where the pins are soldered to the foil side of the board. One or more will look ring cracked or fractured all the way around the pin. At this point you have two options, carefully reflow solder over each pin and put it back together or replace the IC by de-soldering it and removing it from it's heatsink. remember to use a good heat sink grease when applying the new IC.. There should also be a couple of caps in pretty close proximity to that IC... One should be about 50v/100uf and in the shop here we test em all... You might also just replace that one for good measure - they're not expensive either... If any of this sounds too complicated take it to a reputable shop and pick it up in a day or two.. Job shouldn't be that expensive or time consuming. My record in the shop here for doing those is 15 in one day. Average cost for that set, we charge is under $100 if you bring it in and pick it up.. Hope this helps Bill If you're calling around to the repair shops you might just ask if they have that IC on-hand or if they will need to order it..

Posted on Jun 07, 2007

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  • 1153 Answers

SOURCE: RCA Television D52W14

The first thing in this unit is to check the ribbon cable that goes from the front control panel to the back ssb board, I would unplug and replug to make sure seated properly. Then try it again. There are alot of screws to take out but worth it if this solves the problem.

Posted on Jan 08, 2008

SOURCE: LG Rear Projection Television Model RT-56NZ23RB - Fault

For my LG TV - LG RT-56NZ23RB, I replaced two STK 392-120 chips and it has fixed convergence problem now.

Posted on Jun 09, 2008

  • 1 Answer

SOURCE: TV Picture Goes Black

I had the same exact problem.
I removed the bulb and cleaned it. There is a small screen at the top of the bulb and it was covered with dust. Once it was cleaned I replaced the bulb and it solved the problem.
Thanks to those who posted the solutions

Posted on Sep 14, 2008

Jannarama
  • 14 Answers

SOURCE: Problem with sound and picture

If you have Cox Cable, and are using a Scientific Atlanta box, AND have "On Demand", and the volume suddenly goes out, turn your cable to the "on demand" channel (in Phoenix, AZ it's channel 1) and that usually restores the sound.

It's a known issue, and so far this is about the only solution that works quickly.

Posted on Mar 19, 2009

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