After changing capicters my LCD model 920NW display same problem

I have the very same problem and I have no knowledge of the backlights of LCD panels. Is there any way to fix this yourself?

Click start control panel administration tools computer management device manager scroll to display adapters + to expand you might see a yellow question mark ? or exclamation mark ! or a red x right click select reinstall drivers
You might need to upgrade your graphics card drivers

you might have to remove your graphics card to make sure the socket is clean
restart your computer the reinstall it this should activate found new hardware wizard
if your computer came with a mother board disk the drivers could be on it

click start control panel,display,desktop you can select a different desktop from the drop down list
or a browse button where you can select different pictures this may vary depending on your operating system

also you can change the settings for more or less pixels or from the drop down list pick the appropriate level of color range or troubleshoot also select advanced then general dpi normal size,larger size or custom settings
always click APPLY after making any changes

hope this helps you

Is your monitor PHYSICALLY broken, or just not working??

There is a problem with the LCD display panel.

If the monitor is still under warranty it can be replaced free of charge.

your display has got some component ruptured due to over voltage ,you have to change your monitor because its a permanently effect and can not be removed easliy,

If you are saying that it powers off in a few seconds you most probably have a bad (internal) power supply.

Most common cause of the failed monitors are bad caps in the power supply, if it is about two years old, I would open it up and look for bad caps first, then look for any burnt parts, post back so we can guide you further, see failed SAMSUNG monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums

kanwaldeol, No need to degauss an LCD monitor. Only degauss CRT type monitors!!! Could have fractured lcd glass panel. 12fixlouie

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

This is due to backlite problem of LCD panel.
You may approach authorised service center for this issue they will solve your problem. Do not try to do yourself unless you have sufficient experience on LCDS.