Question about Samsung SyncMaster 740N 17" LCD Monitor

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I have sumsung monitor 740N, problem disply time is 4 sec only,i check the pcv board all capacitor are ok.pls help to solve this.tnx

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

How is the DC voltage for the backlight inverter circuits?
Caps can look OK but can have high ESR.

If you are going to DIY and have proper tools and know safety precaution then please read on:
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 monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net
Capacitors kit: http://lcdalternatives.auctivacommerce.com/

Posted on Aug 04, 2010

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