Question about Sanyo DP42849 42 in. HDTV

1 Answer

Sanyo DP42849 42 inch

Tv powers on, but picture goes blank after a second. i replaced both master and slave inverter boards but no luck. please help

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  • Sanyo Master
  • 749 Answers

Find your TV model in the list, compare with the symptoms you have and if there is a match send the board for repair:
http://www.coppelltvrepair.com/search?q=DP42849

Posted on May 30, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

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Shuttle83
  • 1139 Answers

SOURCE: Inverter opertion

Hello davidweldon,

If the inverter board is bad, I would suggest that you replace the whole board unless you have a SMD (Surface Mounted Device) rework station, and a background in electronics. I have worked on TVs where people have tried to remove SMDs and it never is an easy thing to do, so I would again suggest that you replace the whole board, because all of the components are SMDs.

Now as to your question, I have seen on these sets the majority of the time it is a driver transistor that goes bad.

I hope this helps,

Thank you,

Shuttle83
www.electron-age-technologies-llc.com

Posted on Nov 28, 2008

waynejamescm
  • 67 Answers

SOURCE: Have a Sanyo Plasma TV

Hello,

Yep. The power supply in Sanyo Plasmas are generally prone to failures. It could be a failure in the panel not priming, but I doubt it. Turn the lights off in the room, then try to turn it on. If you see the screen faintly flash, the panel is priming, but it is not coming on. If the screen is lit, but is still "black," then it is a control or digital board. If it is totally black with no light at all, then it doesn't entirely rule out the first two, but makes a power supply failure more likely.

They usually have a lot of heat damage to them. If you have tried unplugging it for 15 minutes, then plugging it back in and it still doesn't work, the it is most likely a secondary in the power supply.

I hope this helps you...

Posted on Jan 10, 2009

javswr
  • 44 Answers

SOURCE: sanyo ce32ldy1b lcd 160gb black screen with sound

It sounds like you have a power supply problem, this powers the inverter! Where you just replaced the inverter, we could assume it is good! Look for some bad caps (capacitors) on the power supply board. They will look bulged on the top an may be a little leaky (brownish stain). The power supply can fail on some output and be good on others. Was the back light inverter new? If all else fails, see if you can return the back light inverter and get another! I hope this is helpful!!

Posted on Mar 02, 2009

  • 8457 Answers

SOURCE: SANYO DP26647 blank screen, please help

U have LED front power tv light come on and bliking?Than ur power suply it dead.Power supply board must be replaced.Tries Shopjimmy.com,Ebay.com to buy a refurbish power supply board.

Posted on Feb 10, 2010

  • 8457 Answers

SOURCE: I have no picture on my Sanyo Dp32746 LCD tv, the

U replaced the 1 or 2 LCD inverter long boards,still the same problems.Sorry,this is a rare problems,but it seem the Tuner board is the problems.Replaced the Tuner board,will solved this problems.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish Tuner signal board for the replacement.

Posted on Oct 08, 2010

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1 Answer

My TV gets power and sound. The picture is on for a bit and then goes blank, then comes back on, then goes blank. What parts do I need to order to fix it?


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://electro-medical.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 board.

May 17, 2016 | Vizio Televison & Video

Tip

42PFL7422D/37 Flat Panel LCD TV no picture no sound


I HAVE A 42 INCH PHILIPS MODEL 42PFL7422D/37 TV.

MY PROBLEM IS THAT IT HAS NO PICTURE AND NO SOUND.
THERE IS A GLOWING BACKLIGHTING.

THERE IS A BLUE LIGHT WHEN I TURN POWER ON THE TV. NO CLICKING RELAY SOUND.

MY PROBLEM WAS IN THE SLAVE INVERTER BOARD.

THE IC CHIP WAS BLOWN - SEE PICTURE. THERE IS A BURNED, DARK BROWN MARK ON ONE OF THE CONTACT LEADS ON THE CHIP.

THERE ARE $20 FIX IT KITS THAT YOU CAN BUY ON EBAY TO REPLACE THIS TINY LITTLE CHIP BUT IT'S RECOMMENDED THAT YOU SOLDER VERY CAREFULLY. I TRIED, AND DAMAGED THE BOARD SO I BOUGHT A USED ONE.

REMOVING THE IC CHIP IS PROBABLY BEST DONE WITH A HOT AIR SOLDER GUN. THEY COST ABOUT 50-200 DOLLARS.

AFTER INSTALLATION IT FIRED RIGHT UP.

IN ADDITION TO THE JUST BUYING ANOTHER INVERTER BOARD, I ALSO TESTED THE MASTER INVERTER TRANSFORMERS. ON THE POWER SUPPLY BOARD, I TESTED THE DIODES, AND RESISTORS, AND CHECKED THE FUSE.

AFTER ALL OF THE ABOVE, I UPDATED THE FIRMWARE BY GOING TO THE PHILIPS WEBSITE.

LUCKY FOR MY SITUATION IT WAS NOT THE MASTER INVERTER, MAIN , TCON, POWERSUPPLY, OR DAMAGED BONDING ON THE LCD PANEL ITSELF.

TOTAL COST $50.

GOOD LUCK!!!

on Dec 23, 2011 | Philips Televison & Video

1 Answer

My 42 inch lcd vizio tv flashes like a stobe lite after a minute of powering it on then goes black what can i do


That sounds like an inverter problem. Check the capacitors on the inverter boards. There will be two on each board. The master inverter will be on the far left side, and the slave will be on the far right side. You will have to remove the metal covers over the inverter boards. Should be 4 small phillips head screws. If the capacitors have bulging tops, replace them.

Jan 15, 2013 | Vizio VX42L 42 in. LCD TV

1 Answer

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

Mar 26, 2012 | Sanyo DP42848 LCD TV

1 Answer

Vo42l no picture. please help!


I had the same problem. No picture but sound. When I turned on the tv, and shined a flashlight around the screen from about 3 inches away, I could it was displaying something.

At first I replaced the main board which has 0171-2272-2604 stamped on it. You can google Vizio VO42L service manual and get a pdf which will show how to remove the back. I got the board from TSM www.tristatemodule.com3642-0482-0150 3642-0482-0150 Vizio TV Module, main unit, 0171-2272-2604, 3642-0482-0395, VO42LFHDTV10A 1 $88.95 $88.95


Order Notes: None
SubTotal:
$88.95 Shipping: USPS Priority $20.00 Tax:
$0.00 Total:
$108.95 However, after I replaced this board I still had the same problem. So next I replaced the Invertor boards. There is a Master and a Slave board to the right and left sides of the main board. I ordered these from Coppell tv.
on Ebay.
6632L-0470A & 6632L-0471A INVERTER REPLACEMENT SET - NEW, OEM, WARRANTY ( 110882329800 ) 110882329800_1.jpg Paid on Jun-08-12
$49.99 -
1
$49.99
USPS First Class Package Estimated delivery: June 13, 2012
These are compatible replacement inverter boards and work well. All I had to do was bend a tab on the aluminum cover that goes over the boards. After installing these inverter boards the Vizio display works. I started with main board replacement because from what I read online, the problem was either the mainboard (which had the most posts) or the inverter boards. So I picked one.
Install tips:
Download the PDF Service Manual VO42L FHDTV10A_LPL,AUO Service Manual.pdf for some help with the back cover.
When you take all the screws out, set them aside in the same pattern they were on the board for ease of putting the back in.
I was not able to remove the connector on the Ribbon cable between the master and slave invertor, so I left it attached and carefully undid all the tape and removed the boards attached. I plan to send the old boards to Coppell TV (really nice to work with) for their re-use.
I hope this helps.

Feb 27, 2012 | Vizio VO42L 42 in. LCD TV

2 Answers

Philips 42PFL7422D/37 42-Inch 1080p LCD HDTV Picture went out but still have sound. Any tips on how to fix it?


If the backlight of the LCD-panel does not function, (no picture) then Master and/or Slave inverter are defective. Inverter boards are screwed to both sides of the LCD display, if they have revision 1.2 boards then they will need replaced with revision 1.3 boards.

Feb 16, 2011 | Philips 42PFL7422D 42 in. LCD TV

2 Answers

When tv gets powered on the screen flickers for about one second then goes blank


The tv 2 long boards call the LCD inverter boards are dead.These 2 long LCD inverter boards help the LCD screen panel to have a backlight to produced a picture.Tries websites like Shopjimmmy.com,Ebay.com to buy those 2 refurbishes long LCD inverter boards for the replacement.

Aug 05, 2010 | Toshiba 40G300U TV

1 Answer

Ihave a 32 inch flat screen Westinghouse tv that comes on with picture for 8 seconds then goes blank. I still have sound....can you help?


Ur tv the LCD inverter board it dead.The LCD inverter is the board that help the LCD screen panel to get a backlight to produce a picture,the LCD inverter board is dead and it not working anymore that why u only get 8 sec.of the picture.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter board for the replacement.It a long board in shape.

May 21, 2010 | Westinghouse LTV-37w2 HDTV

1 Answer

Sanyo ce32ldy1b lcd 160gb black screen with sound


It sounds like you have a power supply problem, this powers the inverter! Where you just replaced the inverter, we could assume it is good! Look for some bad caps (capacitors) on the power supply board. They will look bulged on the top an may be a little leaky (brownish stain). The power supply can fail on some output and be good on others. Was the back light inverter new? If all else fails, see if you can return the back light inverter and get another! I hope this is helpful!!

Mar 01, 2009 | Sanyo DP32746 32 in. LCD Television

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