Question about Samsung SyncMaster 740N 17" LCD Monitor

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Samsung SyncMaster 740N - backlight dead

U 202 (4502C AA5TB) seems to have got very hot. Which signal is expected at the connectors CN301 to CN304 to let the tubes emit light?

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  • ubozkurt Feb 10, 2009

    i have same problem

    i have no baklight wat is the problem

    help?

    please write here or

    ubozkurt@hotmail.com



    best regards

  • Anonymous Mar 14, 2014

    Samsung SyncMaster 740N

  • Anonymous Mar 14, 2014

    Samsung SyncMaster 740N horizontal

  • Anonymous Mar 14, 2014

    Samsung SyncMaster 740N horizontal

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Power on monitor is on but faint back light

Posted on Feb 22, 2009

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The samsung LCD monitor(740N) was black out, but if you look "very closely" you will notice that the monitor is working but you can't see the output. Its like there's a problem on the monitors...


The problem will either be with the backlight or the inverter for it. The only way to be sure will be to take it apart and check whether or not the inverter is putting out the correct voltage.

Mar 15, 2011 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

Samsung's LCD monitor SyncMaster 740N; backlight failed, I replaced bulging capacitors on PSU and burnt fuse but backlight is still not coming on


There is a inverter transformer on the board that may be defective that generates the high voltage that drives the lamp, you may end up having to replace the whole inverter board to get it working again.

Jan 26, 2011 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

Black screen with power on power indicator color blue ]


It looks like the backlight inverter of your monitor is dead. Replacing it should resolve the issue.

Aug 14, 2010 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

740N blank screen


I would inspect all the caps, if you find even one bulging top/leak you should replace them as a set.
See failed SAMSUNG here, use good caps, such as PANASONIC FM or FC series from DIGIKEY.
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Service manuals:
http://elektrotanya.com/?q=showresult&megnev=SAMSUNG megnev2 =% 20 & 740N = & Category = & kat2 schematics

May 02, 2010 | Samsung SyncMaster 740N 17" LCD Monitor

4 Answers

No driver


samsung website have not this driver :(

you can download free SyncMaster 740N driver from :

http://uploading.com/files/71958d12/SyncMaster%2B740N%2Bdriver.rar/

Aug 12, 2009 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

Samsung SyncMaster 740N - backlight dead


go to technician, your monitor have a depective capacitor, screen need a couple hundred of volts, so if one capacitor s depective your monitor is shuting off.

Jul 18, 2009 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

N0 or Very little backlight on Samsung SyncMaster740 17" Monitor


back light is going bad. if you see a pinkish hue on the" checking signal" box on screen when it comes on. Should be white.

Feb 22, 2009 | Samsung SyncMaster 740N 17" LCD Monitor

2 Answers

Samsung 740n death


What do you mean by dead???No picture,no raster...I don't have a schematic but by experience you have a problem in the PSU 5V power line

Aug 04, 2008 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

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.

Jun 10, 2008 | Samsung SyncMaster 740N 17" LCD Monitor

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