I too had the problem. I have two Samsung 24" monitors, S24E390 and C24F390 (curved). The curved is newer. Started blanking out, usually when I go through a reboot and restart my laptop (these are connected to my laptop so I use three monitors, the laptop internal and these two external. What I observe is the laptop and S24 start fine, but the C24 begins to flash. Looks like it tries to start, but cycles, flashing perhaps every 7 or 8 seconds? Tried a lot of tricks and might get it to work eventually. Once on it seems fine, just don't restart.
Solution. I swithed the power connections on the two monitors. Now the S24 is the one flashing, meaning the problem is with the transformer. I'm a squirrel (my wife hates this). When I trash anything, I save parts, like transformers. So I need at least 14.0V DC with 2.1A for output with positive in the center. Toughest part is getting the diameter of the connector correct. I found an old Samsung with 14.0V DC with 1.78A. It's working fine, bit shy on amperage but is working. Anyway, indicates the issue is crappy transformer. Sell a high quality monitor, but gives us a crappy transformer? Anyway, should set you up.