Question about Samsung Televison & Video

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65" Samsung tv mu658000f Continuously rebooting. When I unplugged the main board and power board, it stayed on. I assumed the power board is good. I figured it was the main board and replaced it.

Posted by Stephen Holloway on

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The Knight

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  • Samsung Master
  • 76,582 Answers

If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
https://elektrotricks.blogspot.com/
faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent. Search the site by type in the brand name and model of your set, in its search bar at the right side column, and press enter.

Posted on Mar 03, 2021

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Anonymous

  • 1 Answer

SOURCE: Replacing main board

Westinghouse LVM-37W1 37 in. LCD hd MONITOR THE TV WHEN YOU TURN IT WILL NOT STAY ON IT CUTS OFF THE TV REPAIR MAN SAYS IT NEEDS A NEW MAIN BOARD

Posted on Feb 24, 2009

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marionbagget

  • 718 Answers

SOURCE: how hard it is to replace by yourself main board Samsung LN-T4065

You need to do some more diagnosing of the problem. If you get sound and change channels take a bright flashlight and place it again the screen. Look for an image around the edge of the flashlight.
If you see an image that means the LCD controller board (TCON) is probably good.

The problem is probably one of three causes;
1) Inverter board is bad
2) CCFT (cold cathode fluorescent light) are bad.
3) Power to the inverter board is bad. You can also check the connectors.

Posted on Mar 30, 2009

Anonymous

  • 458 Answers

SOURCE: ln40a530 samsung lcd tv wont turn on

MAY BE PANEL LAMP BAD

Posted on Oct 21, 2009

Anonymous

  • 1 Answer

SOURCE: hp-t4254 On Off issue...somewhat same as others

alguien me puede ayudar me pasa lo mismo

Posted on Jan 01, 2010

MICHAEL MULLINS

  • 927 Answers

SOURCE: Which Replacement Power Board for LNT4665F Samsung LCD TV?

Howdy,
It would be a lot cheaper if you just replace the two caps that have gone bad. Just get a cheap solder pencil from the store and about an inch of solder and you are in business.
The Power Supply Board is the center Board (towards left) after you remove the back off the TV. Remove Board from TV with the 6-7 screws. Replace capacitors CM852 & CM853; 2200ufd 25volts.

Thaks for using FIXYA, BIG IRISH.

Posted on Jan 02, 2010

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Hello. I have a Samsung 65" 4k TV ( UN65F9000). And have a no power issue or power issue. The screen got wonkey and then went black and now only clicking from PS Board. Removed back panel and...


First off 3.2 is the correct voltage for the PSON so we know the main board is sending the signal back to the power supply instructing it to come out of sleep mode and go to work, if your other power supply voltages are ok then you can rule out the power board. A gut feeling is you have a bad main board but its only a guess without doing some testing on the TV...you said you don't have sound, is that because you can't tell what input the set is on?...also have you tried the flashlight test?

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Fault at its main digital board. 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/
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? 4:41
https://www.youtube.com/watch?v=H0cG3lzjuw8
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you will need to check weather the 24vdc supply for the inverter board is good no drop voltage. if no supply check the power supply board. then you should check if their is a inv_on signal at the power inverter board around 3v-4.4vdc . if goes out during power on tried to disconnect the supply going to the inverter board to ensure if their is a shorted parts in the inverter board. if the inverter_on signal also goes out even with out inverter board connected that was mean you have problem in the processor board.

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