20 Most Recent Samsung SyncMaster 740N 17" LCD Monitor - Page 4 Questions & Answers

Please connect an external monitor to the PC removing the present one. If the PC boots and the display stays steady the fault is confirmed to be on the monitor. If so we need to check on the power supply before confirming that it is relative of the main board and will require closer look.
However if the display acts the same manner then PC motherboard has a fault , it can be with the display drivers, the power supply or the mother board.
Take consensus to estimate and decide.

better call the company. it's may be a processor problem..

press the autocorrect button on control panel the screen will be ok

Look for bad caps with bulging/leaking tops, you should replace them in a set.
http://lcdalternatives.auctivacommerce.com/Repair-Kit-Samsung-Sync-740N-LCD-Monitor-Capacitors-P1660401.aspx

Very common problem with all LCD monitors as you can see here:
http://s807.photobucket.com/albums/yy352/budm/

Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r7406380-tv_training_manuals Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you. Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Hi There

Firstly, lets go through the steps of installing a new monitor. I do not know if your monitor worked previously, so let us gothrough the basics.

1. Make sure that the monitor is plugged in properly into a power source (wall socket or UPS).
2. Make sure the power source is switched on.
3. Make sure your monitor is switched on (a led on the monitor must burn). If the LED does not light up, you have a power problem or your monitor is faulty
   
4. Make sure that the monitor's data cable is plugged in properly at the back of the computer AS WELL AS at the back of the monitor.
5. You might have than one place at the back of the computer where the monitor can be plugged in. Try them both.
6. Switch on the computer. You should see the Power on Test (white letters on black background). If youee this, your monitor is working. Then the problem lies probably with your graphics card, or the resolution of the monitor is set too high (I doubt is this can be on a LCD or LED monitor, but it is a thing that should be checked.

WIth all the above checked, it should work. If not, try another monitor. If another monitor does the same, the problem is with your computer or graphics card.

Hope it helps
ANDRE

You need to do two things. First, switch out your monitor input cord (the blue one) and get a new one. If you don't have a new one, then unplug both ends and make sure none of the pins are bent or broken. Then plug and screw in completly. If that doesnt work, google your monitors name and drivers, and redownload the drive for it. It should take you through a repair proccess which should fix it

Hi vijayiitkgp0,

The problem could be that your monitor settings have been kept to auto turn off ,

What you can do is check the power settings from the control panel and check for the 'turn of monitor after' settings, which can have 10 minutes of 15 minutes time.

Set this option to 'never' and this problem would go away.

In case the problem persists then check the OSD settings of the monitor by using the buttons which are there on the monitor for any possible setting that could be the problem.

Hope this helps, in case you have any queries , do let me know.

Hi

It's likely you have a sticky button.

Look carefully to see if you have a Menu button, enter the control panel and use the arrow buttons to scroll to the exit icon and then press menu again to manually exit.

I hope this helps.

For best pictures, you need to set your PC video resolution to the native resolution of this monitor, which is 1280x1024 @60Hz. Try that first before opening up the monitor to look for bad components.
Post back, see what usually goes wrong with SAMSUNG monitors: http://s807.photobucket.com/home/budm/allalbums

More likely to be bad DC filter caps problem, that is what I would look first.
See samples here: http://s807.photobucket.com/albums/yy352/budm/SAMSUNG/

Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r7406380-tv_training_manuals Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Parts: http://interliquidparts.com/

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Hi there.

I suggest you see my tip on fixing the vertical line problem here: http://www.fixya.com/support/r9352105-fix_colored_vertical_lines_lcd_display

Slasher_X

Possible that the mother board has a higer current drain on the back up circuit . You can remove the button cell and check on the board/connections around this section. If there is dirt or moisture wash the board after removing power- allowing time for voltage to drop - use petrol and a tooth brush to clean this section. if the fault does not clear then the mother board has to be checked.

might be a dead spot...
Try this site, might be helpful-
http://lifehacker.com/152062/fix-your-lcds-dead-pixels
Hope that gives you an idea...

This is typical with many sets when it goes old as there is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.

The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.

Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probin

Here are the service manuals:
http://elektrotanya.com/?q=showresult&megnev=samsung&megnev2=740n&kategoria=&kat2=all

Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r7406380-tv_training_manuals Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Parts: http://interliquidparts.com/

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

This can be possible fault with the output circuit as the blinking is in oscillation. Also with many sets when it goes old as there is a high possibility that the components over a period of heating and cooling , tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs.

Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.

if not the fault can be poor capacitors- try heating to see if the oscialltions stop- or even failure of IC

I had a similar problem. Hold the menu button for 5 seconds to unlock it.

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.

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.

reset your computer and press F8 F8 immedeatly and keep pressing untill menu appears .then highlight on enable vga mode and press enter your problem will be solved thenk you