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I have an Insignia NS LCD37 09 TV. Two nights ago I fell asleep with the TV on. Sometime during the night the TV shut off/failed. In the morning my wife woke me asking why the TV would not turn on. I noticed the standby red LED was not on, so I got the manual out to see if it had a reset somewhere. The manual said to unplug the TV for 1 minute and plug it back in. This did not work. I left it unplugged for over 1 hour and that did not work either. I did a Google search on this problem and found these TV?s have a problem with capacitors in the power supply that start failing after sets are 1 year old. Mine is just over 2 years old and no warranty left. I have taken the back off my set and I see no obvious visible problems with any of the capacitors on my power supply board. I know some of the boards in these TV?s can be very expensive like the main control board. I was an Industrial Electrician before retiring, so I know my way around troubleshooting and replacing components on electrical controls. If I can determine whether the power supply is putting out the correct voltages to other control boards or not, I can decide if I want to invest in a new one or not. I know I don?t want to invest in a main control board, even if I could find one?they are not available at any parts supply houses online,that I have been able to find?... I would like a schematic and troubleshooting steps to understand how these TV?s work if that info is available. I have been told that Sony, Vizio, and Samsung LCD TV?s are the most reliable sets to buy, but when I did searches for reviews on these brands, I found a lot of complaints with these brands in this same category. I have always thought that Toshiba TV?s have had the sharpest images and color in Cathode Ray Tube TV?s, but they don?t get very good reviews in this new technology. I know they were top shelf in industrial motor controls. Any help in solving my dilemma will help me sleep.

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  • 4 more comments 
  • electrodug47 May 28, 2011

    I have the power supply in front of me and there are no capacitors which have any 3 digit numbers starting with a 5. Mine all start out with a 9. Also do you have a PDF schematic diagram of this board. I saw solutions to troubles answered by budmrtn where he gave the customer a link to schematics.

  • electrodug47 May 28, 2011

    I know this Insignia model is discontinued, but they have issued a 2 year warranty in 2010 on these TV's and I assume this is why they have discontinued certain model numbers. I don't think this power board would be discontinued if other LCD model TV's also have this part number in their TV's. This is the Part Number off the actual power board. 715T2804-3.
    A Google search lists this power board under Vizio and other LCD TV's also. Does this help you

  • electrodug47 May 29, 2011

    I have a C921 but it is 10 microfarads @ 50 Volts. Here is a list of all the capacitors on my board. I also have detailed photos of the board if there is a way to send them

    Capacitors value and voltage on my insignia power board

    I have C946 470 microfarads @ 25V
    I have C943 1000 microfarads@ 35V
    I have C944 470 microfarads @ 35V
    I have C939 10 microfarads @50V
    I have C909 10 microfarads @50V
    I have C947 220 microfarad @ 25V
    I have C926 1000 microfarads @ 25V
    I have C928 470 microfarads @ 15V
    I have C916 100 microfarads @ 50V
    I have C917 10 microfarads @ 50V
    I have C907 120 microfarads @ 50V
    I have C921 10 microfarads @ 50V

  • electrodug47 May 29, 2011

    The standy red LED was off when we realized there was a problem and it has not been on even after unplugging the set for 1 minute. I even unplugged the TV for 1 hour and still nothing.

  • electrodug47 May 29, 2011

    Yes its OK. I have pictures of thid board which will show you the lay out of the capacitors. Is there a way for me to upload them to you

  • electrodug47 May 31, 2011

    Thanks for the help. I am looking for a Capacitor ESR Testing Meter that won't break the bank. Hoped to find a Mark II K-7214 Original Design of **** Smith. They came in kit form but Mr. Smith no longer sells them. Hoped to find a used on, but no luck so far.
    Thanks again

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  • Master
  • 373 Answers

Specifically, there are two capacitors that give trouble but show no visible sign of being bad. And that is C521: 47 micro farads @ 50 volts and C531: 2.2 micro farads @ 50 volts. Replace these and your set should restore operation. These components are on the power supply board.

Posted on May 28, 2011

  • 5 more comments 
  • TV Doctor
    TV Doctor May 28, 2011

    http://tvrepaircourse.fobitz.com/lcd-tv-... Here is a link to an LCD repair course for DIY's. I hope this is helpful.

  • TV Doctor
    TV Doctor May 28, 2011

    According to the model number you listed these are the power supply locations. Another note is that this model is discontinued and there is a user manual but it does not have schematics. I did a search for "Insignia" in google to find the user manual. Here is Insignia support number: 1-877-467-4289

  • TV Doctor
    TV Doctor May 28, 2011

    By chance of a mistake do you have the numbers C921 and C931 on your board? If so, then C921 is 47 micro farads @ 50 volts and C931 is 2.2 micro farads @ 50 volts

  • TV Doctor
    TV Doctor May 28, 2011

    Come to think of it I might have a board scraped that I can reference to. I will let you know as soon as I find it.

  • TV Doctor
    TV Doctor May 29, 2011

    If the led lights on the front of your tv are coming on and going off...if the set tries to come on and then goes off sound and all. Then you are likely to have power supply capacitors bad. And it none of them show obvious bulges at the top of them then the best thing to do is to change all the capacitors on the power supply. If you have a capacitor checker it would be good to check the capacitance of each as you take them out. Don't take all out at once but one at a time and replace them one at a time to avoid confusion. If this doesn't fix the problem then there is maybe a diode shorted on the board. If you have a diode checker with your capacitor checker check for shorted diode. They are the components with the band on one end of a inline two leg component. If you find all this is OK then the alternative is to get a power supply board because one of the surface mount components will be bad. The only board besides the power supply to be suspect is the main board...with the cable hookup and all the jacks. This has the micro processor and could be at fault but more likely the power supply.

  • TV Doctor
    TV Doctor May 29, 2011

    Have you checked the fuse?

  • TV Doctor
    TV Doctor May 29, 2011

    tvdoctor33@gmail.com

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

RFICKES
  • 51 Answers

SOURCE: sound problem ns-LCD37

That's a little weird. Need more info.

Posted on Jan 02, 2009

  • 2318 Answers

SOURCE: Insignia NS-LCD37-09 turns on but no image

If your TV is less then a year old, still under manufacturers warranty. If not under warranty the defective parts could be the power supply or the back light inverter board. Both boards can be replace easily.
The way to know if you have a defective backlight inverter is by shinning a light from a flash light near the screen with the TV on and check in a 45 degrees angle if you have a dark video in the background, if the video is present then you have a backlight board failure. If no video, then is a power supply failure.
I have both boards if you want to buy them.
Let me know if you require further assistance.

Posted on Jan 08, 2009

Mustgo
  • 2359 Answers

SOURCE: I have a problem with

Check for bad capacitors on the power supply board.

Posted on Aug 11, 2010

budmrtn
  • 11361 Answers

SOURCE: My tv has sound but no picture, just started

This one in the pictures has sound and backlight but no pictures due to bad T-CON Bd.
Pictures: http://s807.photobucket.com/albums/yy352/budm/Insignia%20NS-LCD37HD-09/

You need to find out if it has backlight or not so we can figure out if it is power supply, T-CON bd, or backlight inverter board.
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find

Posted on Dec 07, 2010

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