Check for bubble gum on the lens, you might be getting robbed
SOURCE: Samsung SyncMaster 920nw suddenly went black now squeaks/flickers
The 920nw did have a 3 year warranty on the unit but they will be out of warranty now. The flickering power light is an indication of a failure in the power supply board. When the board fails it can't start up correctly and the power shuts down over and over so you get the blinking light and no display. This is a very common failure point on all LCD monitors after a few years of use. There are parts called capacitors on the power supply board and they filter the output power. When they fail the power is not properly regulated and the power supply shuts down and tried to restart so you get the flashing. Here is a link to a repair guide that will show you how to dis-assemble the unit and then what to look for and replace to get it back up and running again.
http://www.ccl-la.com/blog/index.php/repairing-the-samsung-920n-920nw-monitors/
The repair guide has pictures and videos to guide you through the repair.
I hope this helps, if so please rate my solution.
BuddyMc
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