Question about Sanyo DP42849 42 in. HDTV

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Sanyo dp42848 turns on, picture comes on then goes off after a few seconds, sound still works. Ok, here's the weird thing, I used my old tv for a month, after 2 weeks of not being plugged in I tried turning on the sanyo and it still didn't work. Now it has been probably a month and yesterday it started working again...it hasn't even been 24 hours and the screen went out while watching tv and turning it on and off the picture is back to coming on then going off. What could be wrong that it started working after a month and now stopped working once again?

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Sounds like a loose connection to the display panel. Did you physicaly move it from the time it didnt work to the time it started working..

Posted on Nov 10, 2010

  • jlknj Nov 10, 2010

    i'm very electronically challenged...what connection could be loose? We physically moved the tv when it wasn't working to bring my old tv in but after moving it back into the room it was working and I haven't touched anything on the tv since, it just stopped working out of nowhere again..people keep talking about bad backlights and inverters and things I have no idea about but the fact it started working again means what?

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2 Answers

No picture Sanyo dp42848


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/

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There is sone short circuted components at its main board. Contact a technician. This is not a user repairable work.

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I have a sanyo dp42848 tv the screen goes black after a few seconds but still has sound


The model listed here does not use a bulb or lamp and most likely not a do it yourself repair---consider having a shop look at this and get a estimate.

Oct 22, 2012 | Insignia NS-LCD42HD-09 42 in. HD-Ready LCD...

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Picture for only a few seconds then goes dark


Hold a flashlight to the screen after it goes blank, if you can still see anything on the screen, then it is time to replace the inverter boards (there are 2 of them, VIT71043.50 and VIT71043.51).
Cheers,Stewart

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Sanyo DP42848 screen goes blank after few seconds have replaced main board both converter boards power supply has all voltages screen showes connect all cables or channel up or down when first turn on then...


I had the same thing happen to a DP42848 I'm repairing but I could smell ozone on the left side so I didn't replace anything. I just disassembled the screen and found four flouresent tubes not working! I exchanged them to be sure it was the tubes and it was.New screen is out of the question. I am trying to find a broken used LCD screen somewhere and rob the tubes from it as they just snap in and that might not happen so goodbye tv!

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Lightening struck 25 yards from our home, power whent out for afew seconds, the tv will not come on. the power green light comes on for 15 seconds then goes out..no sound or picture Sanyo DP42848 LCD...


Hi,

power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
Hoping that this will help out in solving the problem

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Hello, I'm having an issue with my Sanyo DP42848 LCD TV. When you power it on the LCD panel turns on for about 2-3 seconds then immediately turns off. You can power cycle the TV over and over and every...


Hi,
It only tells us that the inverter cable needs to be reseated or replaced. It's not an expensive repair so fortunately you can consult any local certified technician and have them work on this.

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1 Answer

I have a sanyo model #dp42848 and when i turn it on the picture comes on for a few seconds then you hear a noise the the picture goes out. The sounds still works. What could this be and how much will it...


Hi art_davis,
Power on the unit in the dark room then shine with the flashlight directly in the screen, you will barely see the images. This is because your backlight is not functioning. The following reason was the caused.
1. Power supply - missing B+(supply voltage) coming from this board feeding the inverter board. This is caused by faulty transistor, dried/leaky electrolytic capacitor, open fusible resistor.
2. Inverter board - even the B+ is good from the power supply, if the fuse, driver transistor, driver transformer is faulty no output to the backlight resulting to black picture.
3. Busted backlight - even inverter board is good but if this is busted resulting to black picture also.

Check the parts here.
Diagnosing the fault is technical and if you don't have necessary tools and test instrument and can't fix it yourself, I would advice you to look for an experienced technician to isolate the problem.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

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You should get an extension of warranty usually is 3 months or until end of warranty if is more that 3 months.

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