Samsung SyncMaster 2493HM Monitor:
after a few years of normal operation one day i got home and i couldn't turn it on. Power supply cable is ok. Switch in on, but the power on led doesn't turn on.
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Go to system preferences > displays, then there's an option to rotate the display. You'll also need the corresponding cable to connect it. Enjoy the mac!
Your power supply board is failing and when you wiggle the cord it is turning it on and off until it finally starts up. There are parts called capacitors that start failing and it will cause intermittent power issues such as slow to show picture, flashing power button, wavy or flashing picture. The board can be repaired and the monitor will be as good as new. Here is a picture of the power supply with the parts circled that need to be replaced.
There is a step by step repair guide for the Samsung 2493HM unit here:
The Samsung 2493HM monitor are known to have an issue with the power supply. When the power supply fails you get the 'no power' or 'slow to show picture' problems like you are having. The board can be repaired and the monitor will be just like new again. This is what the power supply board looks like: Here is a link to a free repair guide that will walk you through the repair. http://www.ccl-la.com/blog/index.php/reparing-a-samsung-2493hm-24-lcd-monitor/
Most LCD monitors fail after a couple of years! 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 SAMSUNG 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
The Samsung 2493HM monitors have an issue with power supply failure. When the board starts failing can be slow to show a picture, have no power at all or have a way or flashing picture. Your monitor sounds like it falls in the slow start category. The power supply board can be easily repaired and the monitor will be just as good as new. Here is a link to a free repair guide that will provide a step by step instructions showing you how to disassemble the unit, check and repair the power board. http://www.ccl-la.com/blog/index.php/reparing-a-samsung-2493hm-24-lcd-monitor/
Your power supply is going out. LCD monitors have a common issue. The heat buildup in the in the cases cause parts called capacitors to overheat and bulge. When they bulge out the don't operate properly and cause the power supply to not start up correctly or not at all. First thing check the warranty, Most Samsung units have a 3year parts and labor warranty. If it is out of warranty then repair it yourself. If you can solder then you should be able to do the repair yourself. Check out our web site at: www.ccl-la.com We don't have your exact monitor but you should be able to look at other Samsung guide we have posted and see the parts that need to be replaced. Open your case and replace any capacitors that are bulging and you should be back going again. If you don't want to do the repair yourself we do offer a repair service for you unit, check our site for details.
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I have been same problem but in other type syncMaster, the solution is open your LCD monitor look for power supply module (PCB which have connector to AC power), on that PCB look for capacitor , for normal condition its look like small tube. now look for broken one which upper part is bloated.
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