I have a Samsung LN46C630 that got fried through an HDMI cable. Replaced the main board because of visible burn spots near the HDMI connection and in another spot near a heat sink. TV came on fine and was great for a few days but it started powering off and on randomly. The capacitors on the power board look great. Could something else be wrong in the power board from the surge?

Question 1

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Samsung UN60J6200AFXZA TV replaced leds. Main board, T-con board, or display panel. Please advise

If you have already replaced the LEDs in your Samsung UN60J6200AFXZA TV and are still experiencing issues, it is possible that the problem is with one of the other components you mentioned, such as the main board, T-con board, or display panel. Here are a few things you can try to troubleshoot the issue:

Check the connections between the main board, T-con board, and display panel. Make sure that all of the connectors are properly seated and that there are no loose or damaged wires.
Check the main board and T-con board for any visible damage or issues. Make sure that there are no burned or damaged components.
Check the display panel for any visible defects or issues. Make sure that it is properly seated and that there are no cracks or other damage.

If you are unable to identify the cause of the issue on your own, it is recommended to contact a professional for further assistance in diagnosing and repairing the problem. They will have the tools and knowledge necessary to properly troubleshoot and repair your TV

Jan 04, 2023 • Miscellaneous

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Replacing main board on Samsung 43" model UN43NU6950FXZA

It sounds like you have already tried replacing the main board on your Samsung 43" model UN43NU6950FXZA TV, but are still experiencing issues with it. Since you mentioned that you have back lighting and can hear sound, but nothing appears on the screen, it could be a problem with the display panel itself or with the cables connecting the display panel to the main board.
Here are some troubleshooting steps you can try:
Check the connections between the main board and the display panel. Make sure they are properly seated and secure.
Try using a different HDMI cable to connect your Roku to the TV. If possible, try connecting a different device to the TV using HDMI to see if the issue is specific to the Roku.
Check for any visible damage or cracks on the display panel.
Try resetting the TV to its factory settings. This can usually be done through the TV's menu settings.
If none of these steps work, it may be necessary to have a professional repair technician take a closer look at the TV to diagnose and fix the issue.

Sep 20, 2022 • Samsung Televison & Video

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Samsung model LN52A630M1FXZA HDMI ports don't work.

The problem is the main board, you may look at the stick on the main board to find the part number (usually as BN96-XXXX), you may find a used one from EBay.

Jan 15, 2018 • Samsung Televison & Video

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Samsung 46 Inches LCD TV Model#LN46C630 Black Screen with Sound

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/ 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.

Nov 23, 2016 • Samsung LN46C630 TV

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Vizio tv says no signal on any of the hdmi ports

Unfortunately, you fried the HDMI controller. Not necessarily part of the power supply "main board." (Not sure which board is the HDMI controller in your specific TV. It's usually a separate board by itself). Easiest workaround is to use the "Component" cable connectors. The downside is you only get 720P. However, most cable/satellite and _all_ antenna signals are only 720P anyway. Most people only see 1080P when viewing Blu-Ray discs. Aside from replacing the HDMI controller, the cheapest workaround for multiple source connections is to buy an HDMI to Component Converter A/V box, which allows you to connect multiple devices to one box with one set of Component cables connecting to the TV. Then select various "sources" via the box.

Mar 05, 2016 • Vizio E370VL 37 in. LCD HDTV

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Replaced power supply but TV will still not turn on

hi yes i would thanks

shaun

Mar 19, 2017 • Panasonic TH-42PWD6UY 42 in. HD-Ready...

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Lightning strike to the house, HDMI inputs will not work now. Did the HDMI board get fried? How do i replace/fix this?

Its part of the main board in most cases

Dec 19, 2017 • LG 47LG50 47LG50 47-inch 1080p LCD HDTV...

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Where is the main power board and how can i test it

I have pasted a link that shows you exactly what the board looks like

http://www.shopjimmy.com/samsung-bn94-02701b-main-board-for-ln46c630k1fxza.htm

What is the problem with you set?

Nov 28, 2012 • Samsung LN46C630 TV

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Reset samsung tv without remote

Is the backlight on? If it is, then your main board is probably fried and will need to be replaced as well. Just hope that the main board didn't kill your new power supply board...

Sep 13, 2012 • Samsung LNT2642H 26 in. LCD Television

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Absolutely no power on my Toshiba flatscreen lcd led tv. In a lighting storm we unplugged all of the appliances. This tv still was damaged because it was connected to the cable box via a hdmi cable. Not a...

If the HDMI cable was the only connection, then the high voltage pulse would have had to go through one or more of the video wires in the cable, through the video board, and back out the HDMI cable shielding. What troubles me is you should see the unit come up to standby and refuse to power on. That suggests there was something else connected besides the HDMI cable or the base made a decent ground. At least the panel is worth $150 or so (it is highly unlikely it was damaged).

May 14, 2011 • Toshiba Regza 46RV525U 46 in. LCD HDTV

Question 2

Anonymous

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I would replace the power supply as they are not too expensive.
New M/board, should be OK. Have you checked the RAM for errors and installed the latest BIOS firmware?

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Bud Martin

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Is the main board used? You can verify the dc outputs of the power supply before and after the problem occurs to get some ideas if is si main board or power supply module.

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 PANASONIC FM/FC series Low ESR, 105c, High ripple current and long life rating made for switching power supply from Digikey.com

Answer 3

Chi Chu

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Posted on Dec 06, 2010

Chi Chu

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The power supply board is could be any component parts on it to be to have a mal functions,could be functions find,than just give u a slice of dip in voltage or current this will happen to the tv.U have to have a scope and great troubleshoot skills,to pin point it to the specific part or parts are the problems.It is impossible for a amature,a hobbiest to do to troubletshoot to a specific components slicely dips in voltages or current.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

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Absolutely no power on my Toshiba flatscreen lcd led tv. In a lighting storm we unplugged all of the appliances. This tv still was damaged because it was connected to the cable box via a hdmi cable. Not a...

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Related Questions:

Samsung UN60J6200AFXZA TV replaced leds. Main board, T-con board, or display panel. Please advise

Replacing main board on Samsung 43" model UN43NU6950FXZA

Samsung model LN52A630M1FXZA HDMI ports don't work.

Samsung 46 Inches LCD TV Model#LN46C630 Black Screen with Sound

Vizio tv says no signal on any of the hdmi ports

Replaced power supply but TV will still not turn on

Lightning strike to the house, HDMI inputs will not work now. Did the HDMI board get fried? How do i replace/fix this?

Where is the main power board and how can i test it

Reset samsung tv without remote

Absolutely no power on my Toshiba flatscreen lcd led tv. In a lighting storm we unplugged all of the appliances. This tv still was damaged because it was connected to the cable box via a hdmi cable. Not a...

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LN46C630 TV

Samsung UN60J6200AFXZA TV replaced leds. Main board, T-con board, or display panel. Please advise

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