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Sanyo dp42848 with soud no pic

A sanyo HD dp42848 with sound and no picture you turn it on you see a picture for 1 second and the screen turn black .(u can see picture with flashlight in a dark) .any idea to fix it? thanx.

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  • Master
  • 470 Answers

Change backlight power supply caps.

Posted on Jul 31, 2014

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  • Televison & ... Master
  • 75,178 Answers

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

Posted on Apr 30, 2013

  • simo lasri Jun 01, 2013

    Thanks guys for your help i finaly fix my lcd tv .it was some bad capacitors that i changed on the power bord . The back light converters were ok .so mesur the capacitors befor u buy any parts.if u have a same probleme i had.

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shivam4529
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SOURCE: sanyo vizon tv black screen

hiiiiiii here shivam
i want to tell you that that same problem is occuring my computer but now it is fixed
but your problem is of tv don't worry is this is help full to you--

this problem is common on this model. your vertical output circuit has gone bad. but i am sorry to say that a repair cost is to much for a tv this age. a cost would range 100-150. i say invest this into a newer tv. this model was good for 10-12 years and you have got better than that.
good luck :)
let me know if you need more info?

Posted on May 24, 2008

  • 188 Answers

SOURCE: Sanyo flat screen broken

Check back light inverter.

Posted on Jul 20, 2009

  • 135 Answers

SOURCE: screen went black on my 42" sanyo model dp42647 lcd

Hi there! The panel may be in protection mode. The Inverter board is the most logical area to start after checking power supply Voltages.(5,6,24 and 13Volts). There may be coils on the Inverter Board which have bad soldering or faulty. Other than this it may be main board which controls switch on or off. If all else fails, refer to a repairer. Beware of High Current!!! Best Wishes and Good Luck, Jus004

Posted on Aug 23, 2009

maatmartin7
  • 1213 Answers

SOURCE: 2 year old Sanyo DP42848

You may have a defective inverter. The inverter provides the back lighting you need to see video. There is good chance the starting resistors have changed values. It would be best to replace the inverter in your case. I would have to have a schematic to find the bad resistors. Thanks for asking and show a few hands of support.

Posted on Dec 15, 2010

  • 1 Answer

SOURCE: My Sanyo DP42848 has audio but no picture. How

i turn my sanyo on and its all good for a few seconds then i loose picture but still have sound ,,whats wrong?

Posted on Mar 21, 2011

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1 Answer

Sanyo dp42848 black spots and scrambled screen


Hi,
Black spot means the LCD panel is faulty. Its better to go for new tv than rearing this one.
www.electro-medical.blogspot.com

Oct 07, 2015 | Sanyo DP42848 LCD TV

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/

Sep 08, 2014 | Sanyo DP42848 LCD TV

1 Answer

Sanyo tv sound no picture how do i repair


Thats usually caused by the Inverter boards. You can get a replacement inverter from www.tvrepairworld.com

Dec 11, 2012 | Sanyo DP42848 LCD TV

1 Answer

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...

1 Answer

Sanyo model 42848


This could be a faulty back light lamp.It is located right at the back of the screen It is an cold cathode lamp supplied by a high voltage from inverter board .Inverter board has a input voltage of 24 volts inverted into 300 volts AC this lamp lights up the screen...
You need to open the back cover to check the lamp.....

Jun 06, 2012 | Televison & Video

1 Answer

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.

Aug 30, 2011 | Sanyo DP42848 LCD TV

1 Answer

I have a Sanyo DP42848 LCD tv that I just replaced the power board in with a new power board, no blown capacitors, etc. Before the tv would not turn on and would click. Now the tv turns on, you get a...


No, there is no power reset. You need to find out now if the backlights inverter baord or the 24vdc from the power supply is good. Bad cap can look normal but can have high ESR (Equivalent Series Resistance).
Please read my guide to understand in more details, it sounds like you may have multiple baords failure.
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: http://interliquidparts.com/

Aug 01, 2011 | Sanyo DP42848 LCD TV

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.

Apr 02, 2011 | Sanyo DP42848 LCD TV

4 Answers

My Sanyo DP42848 has audio but no picture. How can I fix it?


i turn my sanyo on and its all good for a few seconds then i loose picture but still have sound ,,whats wrong?

Jan 21, 2011 | Sanyo DP42848 LCD TV

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