Question about Samsung SyncMaster 740N 17" LCD Monitor

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Samsung LCD monitor Model 740N no display.

I have one faulty Samsung LCD monitor model 740N. The problem is when turn on the power supply, only LED at power button light up, no display come up. Suspected power board having problem. anyone who is familiar on this power board can help me which component or portion that normally to cause this problem.

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  • Expert
  • 75 Answers

Pls chek 1000/25cap ,and inverter fuse, and 5402 ics

Posted on Jan 31, 2014

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: i want power supply circuit diagram for samsung

Samsung SyncMaster 740N LCD Monitor
Click the link below to download the Schematic diagrams:
http://manuals.xtreemhost.com/dw/samsung_740n_SCH.pdf

Note: PDF manuals require the Adobe Acrobat Reader for viewing and printing.http://get.adobe.com/reader/

Posted on Oct 28, 2011

  • 6771 Answers

SOURCE: Samsung SyncMaster 740N 17" LCD

The problem is in the power supply and inverter board, cause normally bad capacitors that sometimes bulge at the top indicating they are open.

Posted on Feb 21, 2011

russolini
  • 47 Answers

SOURCE: Samsubg 17"LCD 740N monitor flickers

It sounds like the CCFLs (backlight lamps) in the monitor are failing. You might be able to get them replaced by the manufacturer if it's still within warranty. Otherwise the fix might involve an expensive technician and replacement parts.

Posted on Jun 10, 2008

  • 1 Answer

SOURCE: LED POWER ONLY LIFE, SCREEN DISPLAY DARKNESS

theres only one solution to the problem you have to replace the whole power supply board .its easier to replace them than finding and soldiering the defective parts like the capacitor on the board .u can just replace the power supply board if u think the power has a problem. if it doesnt work then u have to replace also the main board or the board connecting the rgb cable.its more expensive to replace the board but its worth it. ur lcd will work better and its easy to put them on the lcd casing .

Posted on Apr 24, 2009

  • 36 Answers

SOURCE: Samsung Syncmaster 710n no display and no LED light

hello
I am a technician-informatic. I have repaired about 80 Lcd Samsung monitors with theese problems. I offer the repair manual.
Manual has been done with the experience of the repairing Samsung Lcd monitors. Manual was made by me and shows how to open monitor, how
to solve dark screen problem, how to check and replace capacitors, how to solve the problem non-optimal mode (without reprogramming MCU or
changing the main board) photo are included. 100% functional. The repair process is very simple 30-40min. (does not need a lot of
experience in electronics and expensive instruments) and is not expensive. With this manual you can solve problems by yourself and save
money.

"Not Optimum Mode 1280x1024 60Hz"
- The monitor turns on but turns off by itself, the LED blinks green.
- If you detach from the PC points to "control cable" the picture runs continuously in the vertical direction or presents while line , and
as soon as it is reconnected, the monitor goes off.
- The monitor does not turns on and dont dispaly anything, the LED blinks green-lit, if you detach from pc points to "control cable".
- The monitor turns on, works well some time, but after a window apiers "Not optimum mode. Mode recommended 1280X1024 60Hz"
- The monitor turns on, works well only with low resolution 800x600, when try to change a window that reads "Not optimum mode. Mode
recommended 1280X1024 60Hz"

the manual you can find on ebay (my ebay name is asnerejas123):
Samsung monitor repair manual guide 710n,913v,510n more
220498646211
Riparazione - repair Lcd Samsung monitor 710n,913v,510n
220498645860
Reparaturhandbuch für Samsung 710n,913v,510n und andere
220499443698

Posted on Oct 27, 2009

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I want power supply circuit diagram for samsung 740n lcd monitor


Samsung SyncMaster 740N LCD Monitor
Click the link below to download the Schematic diagrams:
http://manuals.xtreemhost.com/dw/samsung_740n_SCH.pdf

Note: PDF manuals require the Adobe Acrobat Reader for viewing and printing.http://get.adobe.com/reader/

Oct 28, 2011 | Samsung SyncMaster 740N 17" LCD Monitor

2 Answers

Samsung sync master 740N no display. Flickered started then the display goes after its been on for a short wile. Could this be a problem with the capacitors?


Yes, look for two 1000uf capacitors on the power supply PCB near the output cable to the main PCB. They will have swelling and discolouration. Replace those and should fix your problem.

Oct 06, 2010 | Samsung SyncMaster 740N 17" LCD Monitor

2 Answers

The lcd turned black, even though the power button is on


First, connect this monitor to another computer, if you still do not get a Windows image on the Samsung LCD monitor then it is faulty. The fault could be a faulty inverter board that supplies high voltage to the CCFL lamp or the fault could be a faulty CCFL lamp.
Parts for this monitor could be avaiable from LCD Parts, theie WEB site is :-
www.lcdparts.net

Jun 23, 2010 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

No display blinking power led on cold boot


I think a capacitor on PSU board has popped.. Check it. replace it for a $1.00 part

Sep 01, 2009 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

LED POWER ONLY LIFE, SCREEN DISPLAY DARKNESS


theres only one solution to the problem you have to replace the whole power supply board .its easier to replace them than finding and soldiering the defective parts like the capacitor on the board .u can just replace the power supply board if u think the power has a problem. if it doesnt work then u have to replace also the main board or the board connecting the rgb cable.its more expensive to replace the board but its worth it. ur lcd will work better and its easy to put them on the lcd casing .

Mar 01, 2009 | Samsung SyncMaster 740N 17" LCD Monitor

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