I have a new DELLS2209W Monitor. On occasion my

There is a small light behind TFT screen which must have gone bad

Might just have to buy a new monitor as it could be many issues. How much time do you want to diagnose?

Sounds like you need to buy a new cable my dude :)

Check in in the BIOS,(Press F2 key during the start up) if the same thing u see in than BIOS replace the monitor.

The S2209W is designed to be run at the optimal resolution of 1920 x 1080 http://support.dell.com/support/edocs/monitors/S2209W/en/ug/optimal.htm
selecting a lower resolution will result in generally unsatisfactory appearance. This is due to the hard wiring of the pixels in LCD screens.
What you can do to abate the text being too small is adjust the DPI setting from the default of 96 to 120, or even 144 if you need real large text

Make sure your refresh rate is not set too high. for the 192N it should probably be not much higher than 60Hertz

what u can do is.... 1) Backup your Registry first

2) go to Regedit....Start>Run>Regedit
(this is assuming u have latest Nvidia driver's installed)
HKEY_LOCAL_MACHINE/Software/NVIDIA Corp/Global
In global. Make a new KEY called NVTWEAK
In this key, make a new DWORD value called Coolbits now, change the value of coolbits to 3.
Now when you do into Settings for GFX and advanced settings....you will notice a CLOCK SPEED/FREQUENCY tab. Change them.....go up like 20mhz....or 30 or 50...too high will screw ur card...too low isn't worth the trouble.
So, slowly go up little by little until you notice s--- on ur screen that's dodgy..then just fall back behind that Freq.
Also....another fan taking heat AWAY from the GFX card wouldn't do any harm either.

Don't forget to rate this solution.

I had a much older dell laptop (2001?) that did this. For whatever reason it had 5 or 6 drivers loaded for the monitor/display. Of the five, four were identical. I disabled the identical ones and kept the normal one enabled and this solved the problem.

You should be left-clicking when the option for safe mode comes up...