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SAMSUNG UN65H7150AFXZA WAS ON WORKING OK. Left an when returned black screen with standby light on.

SCREEN FLASHES back light led and stand by light. NO picture I remove power to main board and back light stays on. I ordered new main board. Did I do the right thing.

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Main system control memory IC fault. This is a very small IC; have 8 solder terminals, and can be located very near to the main system control-chroma IC. Check and replace it. Be sure to replace it with the same number printed on it; in all respect. Otherwise, it won't go. http://electronicshelponline.blogspot.com/ Before replacing it, try a reset to this set, and then check.

Posted on Dec 13, 2016

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Posted on Jan 02, 2017

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Dear Jimmy, I have a 50PA4500-UM from LG. It has sound but black screen.


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. Pull up older posts.
http://electronicshelponline.blogspot.com/

Aug 20, 2017 | Televison & Video

1 Answer

Samsung tv MODEL UN40F6300AFXZA


Please un-plug the cable between the main board & the power supply board, apply AC power to the TV, if the back light come on, that means the back lights & the power supply are OK, then you need to replace the main board; if the back lights does not light up, mostly the back light LED strip(s) is bad.

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Samsung series 5. 5500 LED TV BLACK SCREEN


perhaps the backlight invertor driver circuit.

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See where the wires from the long LED strips on the both sides of the screen lead you to.

does your model have separate board for backlight ? or is it integrated with TCON ?

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1 Answer

Blank screen, led lights flashes for a while and thn all three flash. also cannot turn off at tv or with remote. have to unplug


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LED TV pulsing


How many have 'blinking' issue with Samsung led tv - Forums - CNET

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Jan 18, 2016 | LG Televison & Video

1 Answer

Samsung HL-S5679W won't start - LED light blinking


Replace Lamp,but CK to make sure Fans are running if OK then replace Lamp Mats Has them for 99.00
1-800-628-1118

May 11, 2010 | Samsung HL-S5679W 56" HDTV

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What does it mean when that blinking green light turns to orange one in lp 350?


Hi
This would be "Standby"
When you press standby, the display and audio turn off and a blank screen is displayed for 15 minutes.
You can change the amount of time the projector stays in standby mode; see “Standby Time” on page 27 for details.
The LED lights orange while the projector is in standby.
• If you press standby again within 15 minutes, the projector returns to normal operations immediately. The LED changes from orange to green.
• If you press standby again after 15 minutes, there is about a 60 second delay before the lamp turns back on. The LED flashes green while the lamp is re-lighting.
• If you don’t press standby again, the lamp turns off after 15 minutes. The LED lights orange while the projector is in standby.
The full manual can be found here:
Infocus customer support
Infocus LP350 Manual
I hope these help
Mike

Sep 18, 2009 | InFocus LP350 Multimedia Projector

1 Answer

Jvc hd61z575 61in. rear projection tv won't come on


ok you have defective power supply in hotside section! maybe they have abnormal oscillation!

 

Oct 11, 2007 | JVC HD-61Z575 61" Rear Projection...

2 Answers

Sound, but no picture. Standby light blinking 5 times


A few weeks ago my set started flashing to a black screen. Now a couple of weeks later, i have no picture, but the set turns on and i have sound. The standby light is flashing. I purchased the set in 2000 so it is seven years old. This is the first problem. Could it be all three of the bulbs? Could it be all three of the bulbs? no as you say that sound is ok that means your power supply &high voltage section is ok. please check chroma ic luminance section or system control section stand by ckt ihanks

Sep 11, 2007 | Sony KP-53HS10 TV

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