Question about Samsung LN40A650A LCD TV

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Ln46a630m1fxza no picture

Had no power replaced audio and t con board

Posted by Anonymous on

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Posted on Jan 02, 2017

gopakumarg43
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SOURCE: Replaced main power board and t con board. Picture now works, but horizontal white lines moving upward.

Sounds like fault with its main power supply bard too. Check all the wiring connections from the main board to SMPS board for any loose connection. Improper wiring too can cause this fault, due to AC line interference. Check these well, before replace the SMPS [power supply] board.
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/

Posted on Jul 25, 2015

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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

I have a Samsung LN46A630M1FXZA TV that had sound but no picture. I changed the T-Con board and now there is a picture but it is very light, washed out.


This is often caused by the Y-sustain board, be careful to drain all power before undoing the ribbons and are all secured before testing with power, I blew my whole board this way.

Oct 26, 2016 | Samsung 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

I have a LG LED TV 55LS4500UD that no longer works after a storm. It won't turn on and no standby light. I have pics of the circuit boards. I would like to know which board to replace?


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.

Apr 11, 2016 | LG Televison & Video

1 Answer

LG LCD Tv - No picture but have audio and new t-con board. What board to replace next?


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. 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.

Apr 07, 2016 | LG Televison & Video

1 Answer

My Phillips 47 LCD TV is loosing picture but is keeping sound.


Main board feeds the t con board. However try the flash light test on set because it might just be the inverter board that powers the backlighting.

Mar 17, 2016 | Televison & Video

1 Answer

Should I repair my Samsung LCD with a T-con board replacement?


Hi, maybe before replacing T-Con board it should be better to check voltages from power supply to the board, you could google for the service manual of your TV to have the right values of voltages and the signals you could check.

Nov 02, 2015 | Samsung LN55C630 TV

1 Answer

Samsung LCD slow to power on.


Sounds like main power regulator board fault. Contact the authorized service centre to buy a genuine board; or check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. 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/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Nov 17, 2014 | Televison & Video

1 Answer

I have audio and no picture and have replaced the t-con card twice to no avail. what else could it be?


If the replaced T-con boards are working boards tested on another system then the fault is not where it is suspected.
It is important to take a signal and voltage check on the RF inputs so as to trace the signal path or if there was a power loss to the board , in which case the fault can be the power supply unit.

Oct 06, 2011 | Samsung LN-T3253H 32 in. LCD Television

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