I have a weird problem with my samsung 933sn monitor. It was working great for two years, but now it works only in DynamicContrast mode,every other setting gets me a very dark screen, i have connected it to my laptop, same thing. My graphic card is ok, it is just weird. The screen gets so dark, i use my flashlight to open OSD menu and somehow i get it to DynamicContrast mode,turn it off, then turn it on, it works. When i unplug it from power source and from computer, I get

SOURCE: Screen goes blank when I move the mouse

Did it work properly using a VGA (analog) cable? If so, check your DVI (digital) cable against the pictures at the bottom of http://www.datapro.net/techinfo/dvi_info.html.
You probably have one of the two at the left. Each has a different bandwidth, translating to a maximum resolution. The native resolution for your monitor might be marginal if you have a single-link DVI-D cable.
My 204B seems very picky about signal-level. It blinks when connected by DVI, even though it should be fine with a single-link cable, and complains about the settings even though the settings are optimal. Maybe yours is similar. I have ordered a dual-link cable and will try that myself.

SOURCE: No display Samsung SyncMaster 710N 17" LCD Monitor

same problem here...
here is a translated version of a webpage discussing the repair for this error...

http://72.14.235.104/translate_c?hl=en&sl=es&u=http://www.dtforum.net/index.php%3Ftopic%3D55304.msg1010695085%3Btopicseen&prev=/search%3Fq%3DNT68F63LG%2B50%2Bohm%26hl%3Den%26rlz%3D1T4SUNA_enUS219US220&usg=ALkJrhiRO8V09Lo7lnjqW47LE8IE653r7w

solder a 50 ohm resistor on pins 5 & 6 of Novatek NT68F63LG chip...
good if you can DIY, best if a qualified technician do it for you..

SOURCE: samsung syncmaster 740N 17 inch no display

manual and drivers

http://www.samsung.com/it/function/search/resultList.do?searchWord=913v&ct=0&sort=0

SOURCE: i cant unlock osd of my samsung monitor , sync master 551v

Please try again to turn the monitor off. Hold down the Menu button while the monitor is turned off, then press the Power button again to turn the monitor back on. This should unlock your OSD menu. regards

SOURCE: I have owned a Samsung 932BW a couple of years.

reynolds3d, Nothing new here. Happens a lot. 932BW will need to have some work done to the unit's SMPS probably. Read my fixya profile and make decision on what you will do based on info found there. 12fixlouie