Question about Sanyo 42 in. LCD TV

1 Answer

I replace everything inside a sanyo dp42848. Power supply,T-Conn,Video Board and Both inverters. Now the tv comes on but the screen is black or grey . The last part i bought from Discount Merchant was video input board that didn't have the heat sink and metal cover for the video chip (AMD) that protected it.. I'm wondering if there is a reset for the lcd..Or I'm doing something wrong... I know for a fact that its not the t-conn board but something with the video input board..

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  • Sanyo Master
  • 1,837 Answers

Only for a little suggestion even when it has nothing to do with this to know ? https://www.youtube.com/watch?v=t36YT7-5GTY but have you test those kind of fcc flatsheets by manipulating like for example pushing on it with a peace of towel on those sheets for a faultering test ? they can be dry out and come loose by direct sunlight or other cause by heating up over a time and it will become faultering.
Maybe it could be in cause of strange defects if you have service manual and all things measured do not use the new prints without heatsink it should allways on it if the same chipset is used if not modified , or you have bought a refurbished print because of the missing heatsink and metal cover?

Posted on Jun 05, 2017

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SOURCE: Would an inverter from a Samsung Syncmaster 910MP work in a Samsung Syncmaster 940MW?

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The Samsung SyncMaster 940MW monitor has an issue with the power supply # IP-46135T going out. The flashing power light or not turning on are the classic symptoms of this issue. Check out our web site at: www.ccl-la.com We have a step by step repair guide posted that will guide to doing the repair yourself. It involves changing a few capacitors on the power supply. If you can solder then you should be able to do the repair yourself. If you don't want to do the repair we do offer a repair service for $35 plus return shipping. If you have any additional questions just let us know at: tech@ccl-la.com

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Posted on Jan 19, 2010

budmrtn
  • 11361 Answers

SOURCE: I have a Sanyo DP42848

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/

Posted on Aug 01, 2011

diodeic
  • 1622 Answers

SOURCE: Sanyo Lcd sound good screen black. All voltages

Hello,

The T-CON board is usually under a metal shield cover and sitting on the middle top section of the screen, you will see a very thin connector with VERY SMALL WIRE attached to it, be real careful when you try to remove this connector.
There is F1 fuse on the left side of the connector.
Check to see if you do have 12v on it and it is not blown.
if otherwise,
Problem is in either power supply or the Y-Sustain board.
The Y-Sustain is a relatively large board out of which go connections to the side of the display; it's therefore closer to either the left or the right side of the display, has at least one rather large heat sink on it and fat power cables connecting it to the main power supply.

Often there are fuses on that board - one or more.

if they are blown you can try to replace them, but expect them to blow again - usually the whole board needs to be replaced.

Hope this will help to solve the problem...

Posted on Aug 23, 2011

tech4allmen
  • 666 Answers

SOURCE: Hello, I'm having an issue with my Sanyo

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.

Posted on Aug 30, 2011

SOURCE: Sanyo DP42848 screen goes blank after few seconds

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!

Posted on Dec 14, 2011

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Hello... i have a sanyo DP42848 i turn it on and 3 sec the screen goes blank and the sound still on..i think it might be the black light converter board..can you point me in the right direction...


You are right, in most of the case It is the back lights inverter board.

If this TV uses a LG display panel, it uses a single, or double inverter board, you may check out that if there is any PUP-UP electrolytic capacitors, if you do change them all.

If it is not a LG panel, you have to change the inverter board.

Jun 01, 2017 | Sanyo Televison & Video

1 Answer

I have a sanyo dp42848 turns on perfect picture then goes black you can see picture with flashlight voltage from power supply is present visual inspection of all boards and caps look good inverts ?


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 board.

Aug 24, 2016 | Sanyo Televison & Video

1 Answer

How to troubleshoot a sanyo model number dp42848 with no video but power and audio?


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/
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.

Jan 09, 2016 | Sanyo Televison & Video

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 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

My 42" hd Sanyo flat


chances are your backlight inverter circuit has failed, repaired one a few months back with the same problem. To verify this, take the tv in a dark room. plug it in and take a bright\ flash light and shine it on the screen. turn the set on, you should see either the screen saver or video from your source. If this is the case, your inverter is at fault. Depending on your model, your backlight inverter is built onto your power supply board so you will have to replace the power supply/inverter board. Not hard to do, you can do it yourself with care.

Sep 23, 2011 | Sanyo 42 in. LCD TV

1 Answer

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

Sep 11, 2011 | Sanyo DP42848 LCD TV

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

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