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TV does not turn on. Power on light code is 2 long and 5 short flashes. I replaced the power board, main board and the T-con board and the problem still Exsist.

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Claude Kayser

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Posted on Jan 19, 2016

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1 Answer

How can I tell if my main board in my 47LN5700 LG TV is no good


Main digital board fault. Check and replace it. If you wish to get more details visit the site linked here. http://electronicshelponline.blogspot.com/

Feb 22, 2017 | LG 47LN5700 47" 1080p Smart TV 120Hz Dual...

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Tv problems lg and vizeo


Power Issues Troubleshooting
*NOTE* LG & Vizio TVs must be plugged in for 5 minutes before it will turn on*
1. Inspect ALL Ribbons and connectors. Any tears or bad connections between boards must be replaced FIRST
2. If you have any of these boards, it should be the first board to be replaced
A) T-Con Board - Video Problems (No Video with standby light on, audio but no video, grainy, distorted, or color problems in screen)
B) X or Y Buffer Board (Plasma TVs only) - Standby light is on but no power
C) Backlight Inverter / LED Driver - No Video with standby light on
3. Main Video Board
- Standby light is on but no power
- Either video or audio does not work (if no T-Con in TV. If audio but no video it is T-Con)
4. Power Board - No power AND standby light does NOT turn on. If standby light is on try other boards above
5. Panel - No power, distorted picture, lines, slow motion, half screen, faded in / out. Panel problems are usually not worth replacing the panel.

on May 22, 2015 | LG Televison & Video

1 Answer

Lg 42" tv not displaying screen image


The t-con board controls the picture. To test it shine a flash light on the screen abd see if you can see an image when the TV is on. If you do then the T-con board is OK. Look at the back light ballast board (sometimes is part of the power supply board) If you see no movement or a dim picture with the flash light, then the T-con board is gone. You can get parts here: TV Parts Universal TV Stands DLP Chips ShopJimmy

Aug 11, 2016 | LG Televison & Video

1 Answer

Lost picture thinking lightning may have knocked out tv. Checked t-con, main board and power board all are fine. Connection wire from power board and side edge of tv pops and flashes when plugedin.


Short circuit. Replace the connection wire. It sounds that the main power supply regulator board [SMPS] too is damaged. Check it too. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Aug 02, 2015 | Televison & Video

1 Answer

Sharp aquos tv, model no. lc-70c-6500u, no audio, visual at power up, standby/power light flashes 2 times long, 5 times short, nothing else happens, what is this mean?


Sounds like main board fault. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Jul 28, 2015 | Sharp Televison & Video

1 Answer

No Pitcher


its the t-con board if the backlight is coming on and there is sound then the t-con board is faulty. this is the board on the back of the screen has a cable going to it from the main av board. replace with same part number only. this has to match the screen.

Jul 15, 2017 | Sony BRAVIA® KDL46SL140/91 46 in. HDTV LCD...

1 Answer

I type slow, I have a Vizio M261VP LCD TV, I purchased it not working. I purchased a new power supply. A light comes on and flashes in lower right hand corner. I t does not flash on and off it flashes...


Good day sir chris!!!!

Welcome in fixya and I'm happy to work with you...

OK lets proceed to your TV problem..

The possible problem is not the power supply...There some shorted parts on inverter board,T-con board or main board so that the power will not initialize due to that shorted problem..

I teach you how to find which board is shorted or cause of that fault..

Just follow this procedure below.
  1. Open the back cover
  2. Look at the inverter board..it is slim board that have small transformer on it.
  3. unplug the inverter board first.Then try to power it on...
  4. If the LED on front of TV will not flashes from bright to dim it means you have shorted inverter board try to replace it..
  5. If the flashes remain..go to next step..Power off tv then reconnect inverter board,after that unplug T-con board..Then power on.
  6. If the LED on front of TV will not flashes from bright to dim it means you have shorted T-con board try to replace it..
  7. If all those procedure done but still problem persisted the only problem is main board..Replacing main board will fix the problem..
NOTE: When unplugging and replacing of all board make it sure to memorize all connection or its better if you take a picture on it for future reference..

Hope this solution will be helpful..Any rate will much appreciated..

Thanks for using fixya..have a nice day!!

Mar 04, 2012 | Vizio M261VP 26" LCD TV

1 Answer

Red light flashes once then 2 fast


Hello, welcome to Fixya!

This issue is related to a power problem in as much as the TV turns off on it's own.

The problem is consistent with overheating on the power supply board of the TV. it might have worked fine in the past, but that's electronics for you. Power surge, irregular power supply, excess power supply, etc can affect the unit thereby making it to misbehave.

The power supply board of the TV has few capacitors and IC. If any of these IC's gets short or become weak, it can cause the TV to turn off on it's own.

When current passes from electric outlet to the power supply board of TV. The current also goes to the weak/faulty part, then the current stops or slow and the board overheats and TV shuts off on it's own.

To solve this issue, check the power supply board and read it with a meter and continuity tester, in order to detect the faulty part and replace the faulty part on the board which is short due to which power supply board

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board from www/shopjimmy.com to save you some stress.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't have the ability to read the fault, then you might be needing the help of a repairman or you can call a friend that has the ability to help you out.

I wish you the best of luck.

Regards.

Nov 17, 2011 | Philips 50PF9631D 50 in. HD-Ready Plasma...

1 Answer

[email protected] have a LA32B550KIF LCD TV by Samsung. Just recently the picture has gone but we still have sound. Is there a step by step manual that I can follow online to reset the settings? I have currently...


Hello destinee81, let me help you.
I often see things like that, mostly occurs because the problem panel.
To ensure it, first turn tv on than wait a minute until you hear a sound from a channel tv.
After you hear a sound and still no pict, knock gently the panel with your hand ( not too hard but not too soft). If you see a flashing light (on area you knocked) , that mean back light panel is OK. Open rear cover , there are 2 boards (Power board and Main board) and 2 board attached on panel (inverter and T-con) , "beware with high voltage on power an inverter board". Check connection on t-con and main board, clean it with brush to remove dusts on it. if still make no changes , replace the t-con board.

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Second, repeat first step above. If there are no flashing light on knocking area,. that problem from inverter board. Replace it. If any problem and questions, please let me know.
I hope that will help you. Thanks.


Mar 23, 2011 | Televison & Video

1 Answer

Samsung LN-T2632H won't turn on.


Follow these steps to figure out what problem is.
When you turn on TV, look at the back and see if the back light on. If it is on, the power supply and inverter work fine. The suspection now is main board and T-con board (the small board on the middle-top of the panel)
To find the problem from the main board or not. Look at the power supply and measure Vs on - turn on the TV, this approx 5 vlt DC needs constant once you turn on the TV. If it is drop or unstable - main board problem - replace it.
If Vs on is good - disconnect the T-con cable from the power sup. If power sup stop clicking - T-con need replacing. Hope it help.

Aug 12, 2009 | Samsung Televison & Video

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