Question about Samsung LN46A750 45.9 in. HD-Ready LCD TV

1 Answer

Replaced the 4 power capacitors now tv runs for 15min. then picture turns black and volume stays on

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Samsung Master
  • 933 Answers

When the picture goes black, dim the light in the room and shine a bright flashlight on the screen. If you see a faint picture, you have a backlight problem. If this issue came about after you installed the capacitors, double check the installation of your caps. Ensure that you don't have cold solder joints or broken joints!

Posted on Oct 30, 2013

Ad

2 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Ad
  • 195 Answers

SOURCE: Samsunb 4051: TV screen turns off sound stays on.

Most likely this set has an "integrated" inverter, as most samsungs do--and this DOES sound like an inverter problem. Make SURE thought, there are no more bad "10 volt" caps on the power supply...ALL of them need to be replaced no matter HOW they look.

Posted on Oct 15, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Plasma tv randomly goes black


By the highly technical manner in which you set forth the problem, I can see you are far more electronically savy than am I, BUT just a thought: Is there there any sort of timer setting in the TV menu which may be cutting it on and/or off, and which you have somehow failed to notice? Good luck. . .

May 22, 2016 | LG 60PN5300 60" Plasma TV 1920x1080, 600...

1 Answer

Comes on fine, good picture and sound. After about 15min. sound stays on but picture goes black


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://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.

Jan 27, 2016 | Syntax Olevia Lt30hv 30-inch Hd-ready...

1 Answer

TV wont turn on sometimes. push the on button, light turns from red to blue but no display or sound. If I disconnect the power cord for 15-20 min and plug it back in to the tv it will turn on and stay


My Samsung started doing that and it got worst and worst. Searched the web and find answer. It was the high voltage circuit. All TVs now are like computer and it check for 390 to 400 volts and if it is below, the TV will not turn on. Good thing the Samsung has only one capacitor showing the high voltage circuit. Measure the voltage was 381 volts. The capacitor was rated at 100 uf at 450 volts. From some old TV and power supply, got two capacitors rated 150 uf and 220 uf both at 400 volts. Had to connect them in parallel and took out the old capacitor. Now, my TV works fine.

Nov 03, 2017 | LG 42LG30 42 in. LCD HDTV

1 Answer

Samsung TV LN40B500P3f - No Picture ; just audio Hello, Our Samsung LN40B500P3f TV display is black; audio works fine. If I turn TV off and then back on the picture does display for a few seconds but then...


The backlight inverter which is also part of the power supply needs to be replaced. If you feel comfortable you can replace the blown capacitors on it.

Feb 10, 2018 | Televison & Video

1 Answer

STAYING ON STAND BY NO PICTURE OR SOUND


Good day!!!


That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter

Jun 20, 2012 | Televison & Video

1 Answer

Samsung Model 860 LCD TV. Just 2 years old. Screen went black but sound still works. Seems like others are having the same problem.


If the screen is black and stays black, no sign of life at all, you may have one of many tv's with faulty capacitors on the Power Supply Board. Capacitors are responsible for distributing specific amounts of power to a tv's components. That would explain why you have sound but no picture. Most likely, capacitors that send power to the screen have failed.

You have a few options. The first and most obvious is to have it fixed by a pro. The second would be to replace the faulty PSB. The third option would be to replace individual capacitors.

Good luck

Let me know if I can help further.

Kaufman605

Feb 14, 2011 | Samsung Televison & Video

1 Answer

Samsunb 4051: TV screen turns off sound stays on.


Most likely this set has an "integrated" inverter, as most samsungs do--and this DOES sound like an inverter problem. Make SURE thought, there are no more bad "10 volt" caps on the power supply...ALL of them need to be replaced no matter HOW they look.

Oct 15, 2009 | Samsung LN-S4051D 40 in. LCD Television

1 Answer

My Mitsubishi VS50501A Rear Projection TV turns on then off!


Hi name is Ernie, and i have a mitsubishi vs-50501a .... my problem is that the picture is out.. i got sound but no picture.. the problem started with the tv turning off after 15min. then i would turn it back on, 15min later it turned off again. So now it stays on but no picture.. let me know if i can fix it myself.. im mechanically incline.. thanks.

Sep 04, 2009 | Mitsubishi VS-50501 50" Rear Projection...

1 Answer

Sharp LCD TV, Screen goes black sound stays on


Capacitors on the power pack are going bad they need to be replaced that should fix the problem.

Apr 07, 2009 | Sharp LC20SH7U Television

2 Answers

TV picture was warped, no it is black, but the power light remains on...


the problem you are having is in the power supply you can go ahead and take your set to a repairman o look at your set good luck.

May 02, 2007 | Philips Magnavox MS3652S 36" TV

Not finding what you are looking for?
Samsung LN46A750 45.9 in. HD-Ready LCD TV Logo

66 people viewed this question

Ask a Question

Usually answered in minutes!

Top Samsung Televison & Video Experts

The Knight
The Knight

Level 3 Expert

75311 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Jerry Greenberg
Jerry Greenberg

Level 3 Expert

1689 Answers

Are you a Samsung Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...