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Samsung PN51D450 no power

Green light on logic board flashes, New power supply installed. No power

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  • mark miller May 04, 2016

    hi have you tried opening back up and see if capasitors have blown see youtube for blown caps hope this helps mark wait awhite if it been plugged in / on few mins

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: Pioneer PDP 5030 power supply problem

Ok here's how I manage solve the problem... Having the back removed opens the contacts on the interlock switch so I guess if it powers up in this state it senses the high voltages are exposed and for safety shuts down... After this the unit will not power up and the power led flashes red continuously as described before…
After some thought it occurred to me that there may not be a problem at all, just be a simple reset function for this condition… I managed to find an easy solution to this… Just call up the hidden engineer’s service menu – On 3rd generation Pioneer Plasmas it’s as follows > Power down the screen > Hold down the “Input” and “Vol +” buttons on the front > Power the screen up and the Service menu comes up on the screen > You don't need to change anything just simply power off and from then the screen should operate as normal…It did for me so I’m well happy now!!
I hope this information will help someone else one day – Good Luck!!…Rob UK…

Posted on Jan 04, 2008

  • 52 Answers

SOURCE: TV does not turn on/red led flashes 7 times in front

this is common issue with this model and through your troubleshooting is tied to y main board. blinking led on logic main in normal operation. when replacing y main always good idea to replace y upper and lowe buffer boards as they complete a circuit and sometimes replacing one without other could cause additional failure on remaining boards

Posted on Aug 19, 2008

  • 1 Answer

SOURCE: Power Supply Board for SAMSUNG 40" LCD TV Model LA40R81BX

You'll find some Samsung power supply boards here : http://www.usefulparts.com/index.php?main_page=index&manufacturers_id=11&sort=20a&filter_id=98&alpha_filter_id=0
but you have to open your TV first and find out model number

Posted on May 10, 2010

  • 2 Answers

SOURCE: My VP504fhdtv10a vizio plasma TV when connect

Logic Control D Board got nothing to do with this problem. This is your main power supply gone bad(usually not the sub power supply). I just repaired my VIZIO by replacing main power supply. Just remove back cover and your board will be right in the middle of the screen. Just get board part/serial # and google it. My best price was through eBay(around $100). Everything is fine now.

Posted on Feb 07, 2011

  • 22 Answers

SOURCE: Sanyo DP50747 Replaced Power Supply still not working

this issue is related to either the y sustainer and z sustainer boards, checking the fuses on the y/b will giving you a good indication, if they are open(bad) then you'll have a easy fix, if not, i would try replacing the y board first.

Posted on Apr 16, 2011

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TV trys to turn on about 3 times then does not turn on at all.


Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. 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://electro-medical.blogspot.com/
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.

Mar 04, 2016 | Samsung Pn51d450 51 720p Plasma Tv...

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Tv sreen wont turn on


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.

Dec 02, 2015 | Samsung Televison & Video

1 Answer

How to troubleshoot Samsung plasma TV with no video.


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/

Oct 01, 2015 | Samsung Televison & Video

1 Answer

I have a sony bravia kdl40v2000 lcd tv stays in standby mode with green light on all the time, no picture no sound, suspect capasitor fault on power board, which capasitor need replacing


There are no paticulator capacitors components parts are dying and or leaking in sequences in any forms of numbers on the tv power supply board.It could be any numbers capacitors components anywhere in the tv power supply board could be dying and or leaking.U must have to take tv parts and examine the power supply board carefully for dying and or leaking capacitors components parts.Very easily to spots dying and or leaking capacitors components parts because 90-95% of the times they're alway puffing and or bulges up on to it tops it is looking like it about to be exploded out of it cylender container.If the tv every times u turn it on the tv power the tv LED power light indicator are alway stay on a good solid green color,LED power indicator light never blinks or flashes at all.Mean the tv does not have a tv power supply board problems,mean the tv it have a problems with it the main logic Tuner signal board problems,that is the board where the tv incomming broadcasting signal wire plug into it.Tries those websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish main logic Tuner signal board for the replacement.Because this main Logic Tuner signal board components are all in micro chips and are all in micro surfaces mounted on micro surfaces mounted on components parts by a circuits printed and put it on by machines.

Dec 03, 2011 | Televison & Video

1 Answer

Power light flashing green. No other light or sound. Per directions I found here, I bought a new power supply board. No change at all. Any other ideas?


Ur tv still having the same result a flashing LED power light indication,after u change the tv power supply board.Mean only one thing the main logic Tuner signal board it is also dead too.The Tuner signal board that the board where the tv incomming broadcasting signal wire plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish main logic Tuner signal board for the replacement.Tries out the old power supply board with the new refurbish main logic Tuner signal board too 50/50 the old power supply could be still functioning.If ur old power supply board still good and functioning,than return ur new bought refurbish power supply to the vendor u bought it from to get some money back.

Sep 14, 2011 | Televison & Video

1 Answer

There are two green lights blinking at the bottom of the tv. where the power light is..i believe it's the opc lights. the tv shuts of it self and the two lil green light blink...we put the tv power...


The tv main logic board known as a tv Tuner signal board it is the causes and the problems.The tv main logic board,the tv Tuner signal board it is shorted and not taking in and sustance power from the tv power supply board anymore that why tv Power and OPC LED lights indication are flashing together.This main logic tv Tuner signal board that the board where that take in the tv incomming broadcasting signal wire plug into it.U must replaced the main logic tv Tuner signal bard to fixed this problems.If U have some mechanicals skills like take things aparts and putting it back together again?Yes,tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish main logic tv Tuner signal board for the replacement.Tries tv unplug,replug it back about an hour later.Tv might work again for awhile though,but to fixed this problems for good the main logic tv Tuner signal board must have to be replace.

Aug 22, 2011 | Sharp Aquos LC-52SE94U 52 in. LCD HDTV

1 Answer

My Samsung SPN-4235 had the picture go out several months ago. When the power button is pushed, it just flashed on and off. It wouldn't power on for 6-7 weeks, came back on for a few days, then started to...


The flashing led is on the logic board and it indicates communication from the main bd to the logic bd via the lvds cable --your problem would best be analyzed by verifying the va - vs - ve - vset -and vsc voltages - then if all are good it could possibly be the y-main or the x main bds

Feb 06, 2010 | Samsung SPN4235 42 in. Plasma HDTV

1 Answer

Got new bulb and instaled it the tv turns on but the red and green light flashes and no picture


could be the Ballast for the lamp has failed, the power supply board could be defective. can call 1-800-samsung for nearest service center.

Nov 25, 2009 | Samsung DLP HL-P4663W 46" Rear Projection...

1 Answer

Monitor goes black but the green light stays on. I turn the power button off and then back on and it comes back on. It may stay on for a few seconds to several minutes.


Check to see if the image is Dimmed. Chances are the power supply on the FPD is either dead or not supplying power to the back lights.

Your problem is the back lights are not being powered. There is a signal going to your FPD because the power light remains on green, but the back lights are what helps support an image from the Front Panel Display.
The only way to fix this is to open it up.

If its got 3 boards inside((logic-->video, Inverter, Power)) The problem is the Inverter. Replace it.
The inverter is the board that supplies power for the backlights to turn on. The backlights
provide a light.for the LCD Panel(provides color and is the logic. ... similar to a projector.
If its got 2 boards inside ((Logic-->video, Power)) The problem is the power supply. The inverter is embedded onto it.

Simply replace the part with a known good one, and you got a spanking new monitor.

Sep 18, 2008 | Computers & Internet

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