I have a samsung SyncMaster 2233 monitor.. the black colour on the monitor doesnt seem sharp enough.. i mean black is not exactly deep black everywhere, there are some places on the monitor that show some whitish patches... what might be the reason.. is my monitor defective?? got it just 7 months ago.. what should i do?

You cannot exactly stop it but you can configure it. See the link I included for the complete instructions and screenshots.

You probably have it on Dynamic settings as it would change constantly. I would suggest to keep it under "Standard" or "Custom" if you like your own setting to be permanent.
Configuring SAMSUNG MAGIC Bright Samsung Support Singapore

You're using dual monitors and one is black? If so-- when you switch the cables on the monitors.. the same monitor stays black? This sounds like bad monitor. If I understand you right.

hello Gabriel

Could you check your SyncMaster 2233 for me and tell me your findings. If this monitor is connected from your computer and when both switch on, did the led indication lamp from your monitor lit steady green? or this lead indication lamp lit green then turns red?

1. If the led indication lamp lit steady green then there is nothing wrong with the settings, configurations, driver or hardware on your computer. The problem would be the backlight inverter lamp in your monitor is busted. Or it could be the inverter board that supplies high voltage for the backlight inverter lamp that is bad. You can replace the backlight inverter lamp located at the upper and lower part of the monitor with a replacement part you can purchase at shoppejimmy.com. Inverter board repair can be risky if you don't have the skill. Even opening the back cover of your monitor and replace by yourself the inverter lamp is risky too, could inflict more damage. you can bring it to a local professional service man.

2. If the led indication lamp lit green then turns red, then if not the video card the power supply section from your monitor is bad, you can replace polarized capacitor with same value. Just inspect and those with blown or leaking capacitor. You can also check the terminals and solder joints for the 15-pin vga terminal connector where vga cable is connected on your monitor. Resolder the terminals.

3. If the red indication lamp did not lit at all. Power supply section in the monitor is bad. You can check the output voltage from the power supply section. +5VDC is supplied for the main board and +24VDC is for the inverter board. Replace leaking or blown capacitor with same value.

Just remember, this should be done when computer and monitor is turn off
Post back if you have more questions. I am willing to give you assistance.

http://downloadcenter.samsung.com/content/UM/200810/20081022090131859/BN59-00767A-Eng.pdf

Hi:
Unfortunately, it isn't a Windows problem, but a monitor power or backlight failure. Your monitor's high voltage inverter board, or the backlight has failed. Often it is too expensive to repair, and cheaper to replace the monitor if it is out of warranty

I would return it for a New Model.
Ask to see a display model.
The unit should also have a build date on the tag as well.
Its your money. spend it your way. !

check output from computer with another set of speakers.

Take a look at your power saving settings. It sounds like the monitor is set to sleep after 20 or 30 minutes. You may want to change your setting to "never". The settings are under Control Panel - Power management

in your mon there will be small left arror image in box called enter button,,,,if u press that button its shows analog and digital in that have to choose digital.....

If it is an LCD monitor, the backlight fluorescent bulb is burned out.