Question about Samsung 943NW Monitor

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Stay always black and I heard a blink noise over coils on PCB

With all boards & cable connected internally, no VGA signal: a) 15Vdc become over 20Vdc b) 5,1Vdc are not stable c) 3,3Vdc are not stable d) keyboard led not blink nothing e) I listen a switching noise that is blinking Disconnecting the controller board from Power supply board: a) 15Vdc stayed stable b) 5,1Vdc stayed stable c) 3,3Vdc not present because they could arrived from controller PCB d) keyboard led not blink nothing e) I don't listen any switching noise The main power board hasn't any apparent problem like components in short circuits or open for Fusible/Diode/Coils/Resistor/Capacitors/etc.... The only two components with "problems" are two elettrolitic capacitors in the secondary voltage because they are near to explode in the top are bend and not flat. On display TFT no flashing or any other signals of live....

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  • 214 Answers

The capacitors have failed. Don't put power on it! Replace the swelled Capacitors with the same Value and Voltage and Size. Those bad capitors will cause a myiaid of problems.

Posted on Apr 17, 2014

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Posted on Jan 02, 2017

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tolexade
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SOURCE: Samsung syncmaster 551v

you dont have problem with your monitor, check your cpu very well am very sure you have problems with your system board

Posted on Jul 17, 2009

  • 51 Answers

SOURCE: syncmaster 740 power supply problem

I would check all the transistors (especially the larger ones) for shorts. If you can separate the power supply from the other circuits (such as by unplugging a connector to other boards), I would do this and see if the fuse still blows. If it doesn't, then the trouble is in another area, perhaps the LCD driver circuits.

Posted on Dec 30, 2008

techman
  • 3130 Answers

SOURCE: Blinking power button

It could also be because there is a problem with the display controller in the computer. Try to hook up another monitor to this computer and see if it comes up. If it does not work with another monitor, the computer will need servicing. If the display does come up, the Samsung monitor will need service. Good Luck

Posted on Jun 20, 2007

Geekman
  • 32281 Answers

SOURCE: Samsung SyncMaster 940T. Suddenly went to black

The backlight is problem is caused by either a faulty inverter board or a faulty CCFL lamp.
Check out LCD Parts foe parts, service, and DIY info Use this link to their WEB site :-
www.lcdparts.net

Posted on Sep 17, 2009

Testimonial: "Being pointed in the right direction is sometimes 90% of the solution!!! Many Thanks For The Compass!!"

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SOURCE: Samsung Synchmaster 940MW - Will no longer power up.

Hello,

The Samsung SyncMaster 940MW monitor has an issue with the power supply going out. The flashing power light or not turning on are the classic symptoms of this issue. Check out our web site at: www.ccl-la.com We have a step by step repair guide posted that will guide to doing the repair yourself. It involves changing a few capacitors on the power supply. If you can solder then you should be able to do the repair yourself. If you don't want to do the repair we do offer a repair service for $35 plus return shipping. If you have any additional questions just let us know at: tech@ccl-la.com

I hope this helps, if so please rate our solution.

Buddy
Corporate Computer
www.ccl-la.com

Posted on Jan 19, 2010

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Hi, I am trying to connect my laptop to my TV using VGA (MALE) to VGA (MALE) cable. I am able to see black lines on the TV with noise.How can i correct this ?


You didn't say, is the TV HDTV??
From Windows help menu, press F1, type in "VGA connection" I found this:

Why can't I hear audio when I connect my computer to an HDTV?

VGA, DVI, and component video cables do not support audio signals. HDMI cables do support audio signals, but not all HDMI-enabled video cards support audio. If your HDTV has an audio input, you might be able to connect a separate audio cable from your computer's sound card directly to the TV. Otherwise, you'll need to connect the audio signal to a different output device, such as external computer speakers or your home stereo system. For more information about sound cards, see Sound cards: frequently asked questions.


From Wikipedia.org search VGA connection:
1.
Video Graphics Array (VGA) refers specifically to the display hardware first introduced with the IBM PS/2 line of computers in 1987,[1] but through its widespread adoption has also come to mean either an analog computer display standard, the 15-pin D-subminiature VGA connector or the 640×480 resolution itself. While this resolution was superseded in the personal computer market in the 1990s, it is becoming a popular resolution on mobile devices.[2]
VGA was the last graphical standard introduced by IBM that the majority of PC clone manufacturers conformed to, making it today (as of 2010[update]) the lowest common denominator that all PC graphics hardware can be expected to implement without device-specific driver software.[citation needed] For example, the Microsoft Windows splash screen appears while the machine is still operating in VGA mode, which is the reason that this screen always appears in reduced resolution and color depth.
VGA was officially superseded by IBM's Extended Graphics Array (XGA) standard, but in reality it was superseded by numerous slightly different extensions to VGA made by clone manufacturers that came to be known collectively as Super VGA.

2.
The same VGA cable can be used with a variety of supported VGA resolutions, ranging from 640x400px @70 Hz (24 MHz of signal bandwidth) to 1280x1024px @85 Hz (160 MHz) and up to 2048x1536px @85 Hz (388 MHz). There are no standards defining the quality required for each resolution, but higher-quality cables typically contain coaxial wiring and insulation which make them thicker. A quality cable should not suffer from signal crosstalk which occurs when the signals in one wire induce unwanted currents in adjacent wires, ghosting which occurs when impedance mismatches cause signals to be reflected (note that ghosting with long cables may not be the fault of the cable but may instead be caused by equipment with incorrect termination or by use of passive splitters), and other signal degradation effects; shorter VGA cables are less likely to introduce significant degradation. Some higher-end monitors and video cards featured 5 separate BNC connectors for RGBHV signal, allowing highest quality connection using five 75 Ohm coaxial cables.

I hope this helps, I find the sales reps at Best Buy very helpful.

Dec 04, 2010 | Computers & Internet

2 Answers

Monitor switch on light flashes and no image??


HELLO, CHECK THE VGA CABLE THAT IT IS FULLY INSERTED AND SEE IF IMAGE COMES UP

Nov 18, 2010 | HP L1706 17" LCD Monitor

1 Answer

Red light blinking no picture no sound


tart checking the cable connection to receiver, try moving or replacing cables.

If you have a surround with external speakers check surround connection cable and speakers wiring.

If the cables are OK, then the unit may be faulty.

In that case the fault can be either the audio board (often audio circuit is integrated on the main board) , or the sinput output signal board.
Also a contact on connection to internal speakers can give you same problem.

May 22, 2009 | Toshiba 32A43 32" TV

1 Answer

External monitor connection problem


If you are comfortable with opening your case up you need to follow wiring from plug to system board checking proper connection to the board. If not comfortable or connections are ok then a local computer shop is your best bet.

Jan 29, 2009 | Toshiba VGA Board Graphic Card

1 Answer

TV won't power on, repeating doulbe red light blink


Question Television is not working, screen is black, blinking red led.
Answer Television is probably malfunctioning due to electrostatic discharge. Try resetting the television by unplugging it from the power outlet for 10 seconds.
  1. Make sure that the power cable on the display and the VGA cable with trailing audio cables are connected correctly (use the originally supplied VGA cable.) between 'MONITOR' of the TV and 'VGA1' of the display.
  2. Make sure that the display is switched on.

Jan 24, 2009 | Philips 37PF7320A 37 in. HD-Ready LCD...

2 Answers

Green light continously blinking in samsung sync master 753s


1. cpu problem. why because of there is no signal output from cpu to monitor. the led blinking means there is no vertical, horizontal signals from cpu to monitor.

2. your monitor connected to another system.

3. neck board dry points.

4. cheak the display cable. 13&14 pins are horizontal, vertical signals.1, 2, 3 pins , R G B , 6 ,7, 8 pins R G B ground ( coaxiler cable used , meshed wire is ground )

Oct 13, 2008 | Samsung SyncMaster 753S 17" CRT Monitor

2 Answers

Black screen, blinking power light, no signal


Hi...there,
It's seems you got a defective DVI card. Try using a VGA cable instead. Have nice day!

Aug 22, 2008 | ViewSonic VX924 19" LCD Monitor

1 Answer

NEC MultiSync FE2111SB 22in monitor problem


a blinking green light usually indicates no video signal. check your cables, and if you have another computer, try it on that. otherwise, carefully check your vga signal cable, and the connections on the neck board [where the crt plugs into]

Aug 11, 2008 | NEC MultiSync FE2111SB 22" CRT Monitor

1 Answer

Turned off by itself, blinking red led at front


The clicking sound is the internal protection switch that kicked in because a fault had been detected.

First ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem on dvd with no receiver box connected.

If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the Monitor goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic chargesaccumulating on capacitors, or because of a wrong voltage read by themain chip on your monitor controller board. this started the protectioncircuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , startingthe flashing light.


If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occurr are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing statebecause of the video cable.

Try moving the video cable, and if the cable is not built in, then also try a replacement cable.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Jun 28, 2008 | Toshiba 42HP95 Television

1 Answer

When i turn monitor on it comes up with vga input no input signal


Hi nobumsteers,

This is most often caused by your VGA cable becoming detached from either the back of your computer or it's connection to the back of the monitor. First, check by unplugging both connections and re-attaching them firmly back into both ends.

If it still displays the no input signal error, then most likely your computer's video card is not transmitting signal to the monitor. So we need to make sure that the video card is working.

If your blue connection in the back of the computer is located near all of the rest of the cables (very close proximity, less than 1 inch apart) then you are using an 'on-board' video card. If you purchase a new video card and place it in one of your lower, available PCI or PCI-Express card slots in your computer and connect your VGA cable to that, you should have video again. But this would be a solution to a defective on-board video card, which if it is still under a warranty should be repaired by your Manufacturer.

Hope that helps.

May 03, 2008 | Computers & Internet

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Hi! I have a problem with my Samsung 943NW Monitor. Recently I plugged in a thing which splits my sound input in two: one for a headset and the other for the loudspeakers. After done this my monitor d Recently I plugged in a thing which splits my sound input in two: one for a headset and the other for the loudspeakers. After done this my monitor driver just vanished, and I had a noname plug and play display and the 1440x900 resolution just vanished and was 1024x768 instead. When I tried to install the correct driver (which windows says I've sucessfully done) nothing has changed. I'm using Windows 7 64 bit, which was the only change in the late months around my com, so this MUST be related some way. When I tried to install the driver from the disc I have given along with the monitor itself, the installer says I need to visit samsung's website for 64bit and Vista drivers. No downloaded drivers worked either. Then, after hours of searching I just watching my messed up screen, then suddenly windows did something I still couldn't figure out, and everything was fine again! I had 1440x900 resolution and everything went well... until today... This all happened a few weeks ago, and now I had to move my come in my room from one point to the other, so I plugged everything off, moved it, plugged back in, and now I have the same issue, but still without a solution. If you need any other specifics just ask, and thank you for your help in advance! P.S.: In sort, the windows 7 64bit is messing with the monitor driver after I plugged in the jack thingie, but removing it isn't solving the problem at all.

Mar 01, 2017 | Samsung 943NW Monitor

0 Answers

Hi! I have a problem with my Samsung 943NW Monitor. Recently I plugged in a thing which splits my sound input in two: one for a headset and the other for the loudspeakers. After done this my monitor driver just vanished, and I had a noname plug and play display and the 1440x900 resolution just vanished and was 1024x768 instead. When I tried to install the correct driver (which windows says I've sucessfully done) nothing has changed. I'm using Windows 7 64 bit, which was the only change in the late months around my com, so this MUST be related some way. When I tried to install the driver from the disc I have given along with the monitor itself, the installer says I need to visit samsung's website for 64bit and Vista drivers. No downloaded drivers worked either. Then, after hours of searching I just watching my messed up screen, then suddenly windows did something I still couldn't figure out, and everything was fine again! I had 1440x900 resolution and everything went well... until today... This all happened a few weeks ago, and now I had to move my come in my room from one point to the other, so I plugged everything off, moved it, plugged back in, and now I have the same issue, but still without a solution. If you need any other specifics just ask, and thank you for your help in advance! P.S.: In sort, the windows 7 64bit is messing with the monitor driver after I plugged in the jack thingie, but removing it isn't solving the problem at all.

Mar 01, 2017 | Samsung 943NW Monitor

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