Question about Samsung SyncMaster 940T 19" Digital/Analog LCD Monitor

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How do i get the case open on the Samsung Model 940t case

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Here are the service manuals:

Posted on Oct 09, 2010


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Fireman5, might find video clip of lcd monitor disassembly at YOUTUBE. Be very careful and protect the glass lcd screen at all costs. Do NOT use any sharp cutting instruments to to the "PARTING" of the bezel/rear cover. One slip and you will need EMT's to rush you to ER for treatment of gushing wounds. 12fixlouie

Posted on Oct 08, 2010


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Posted on Jan 02, 2017

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Dim display problem

Hi there,

Have you tried adjusting the LCD's bright and contrast using the buttons on the monitor. Instructions can be found on page 12 of this manual:

If the lcd monitor is dim even upon booting up, then the backlights of the lcd itself is starting to fail and it needs to be replaced.

Please let me know if you need further assistance. Thank you for using FixYa. Merry Christmas!

Dec 25, 2010 | Samsung SyncMaster 540N 15" LCD Monitor

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No on backlight?

Need to check the caps and voltage checking first.

Basic LCD monitor troubleshooting guide:

Failed TV and Monitors:
Capacitors kit: he can make you a set of caps for you.
Please post back what you find.

Oct 25, 2010 | Samsung SyncMaster 940T 19" LCD Monitor

1 Answer

My syncmaster 2233sw monitor has been going black while im doing something and will show it switching between analog and digital what should i do?

You may want to inspect the DC filter caps in the power supply first.<br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">If you are going to DIY and have proper tools and know safety precaution then please read on:</span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed SAMSUNG monitors to get some ideas what to look for: <a href=""></a></span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Post back what you see inside so we can guide you further and it will help out other people in the future also.</span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><a href=""></a><span style="mso-tab-count: 1"> </span></span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Capacitors kit: <span style="mso-spacerun: yes"> </span><a href=""></a><span style="mso-spacerun: yes"> </span>he can make you a set of caps for you.</span><br />

Aug 24, 2010 | Samsung SyncMaster 940T 19" Digital/Analog...

1 Answer

Monitor keeps going off and on. All cords seem

ALL LCD monitors have a thermal protection circuit that turns the monitor off when it is overheated. LCD monitors do not have air circulating fans, so dust buildup is a problem. If your monitor is still under warranty, Please contact your retailer or Samsung at If it is out of warranty, you can try to repair it youtself. The steps to follow are:
1. Fold a large bath towel in half and put it on a table.
2. Disconnect the monitor from everything.
3. Remove all cables from the monitor
4. Place the monitor face down on the towel.
5. Remove the four VESA mounting screws that hold the desk mount to the rear of the monitor.
6. Remove ALL of the Phillips head screws from the rear of the monitor.
7. Use a thin bladed tool to release all of the plastic catches that secure the rear cover to the front cover of the monitor.
8. Use a small brush and a hose type vacuum cleaner to remove all of the accumulated dust from the chassis.
9. Put everything back together by reversing steps 7-2.
power it up and see if this corrects the problem.
10. Do not block any ventilation holes in the case.

Nov 24, 2009 | Samsung SyncMaster 940T 19" Digital/Analog...

1 Answer

Power light comes on but no picture

Try to check if the monitor displays anything - it would be very dark so experiment with angles/lighting. If you see picture it means that backlight is broken. Broken backlight can be caused by:
  1. Burnt "bulbs" (cathodes or LEDs) - If this is an LED backlit display then this scenario is highly unlikely.
  2. Broken inverter (most likely)
In both cases you need to have it repaired by a technician. If this is a relatively new display this will be cheaper than buying a new one.

Oct 12, 2009 | Samsung SyncMaster 940T 19" LCD Monitor

1 Answer

Samsung SyncMaster 940T. Suddenly went to black screen. Disassembled and confirmed presence of the low-power video signal by viewing the screen with a powerful flashlight from behind. Replaced NIB board...

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 :-

Sep 17, 2009 | Samsung SyncMaster 940T 19" LCD Monitor

3 Answers

Awfull colors and very dark at 320x240

hello JareX Perhaps as far as I can tell you that your screen does not suppeot this resolution

Jan 20, 2007 | Samsung SyncMaster 740N 17" LCD Monitor

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