The answer depends on your monitor model, of course.
For some of the LCD models you may reset the monitor by pressing (and releasing) the "MENU" button (OSD menu appears) then hold the "SOURCE" button for a few seconds. When you see the monitor blinks it means that reset was done.
All monitors have their own menu which can be accessed via the four or so buttons on the monitor. Somewhere in that menu there will be a "Reset to factory default" option or similar. You will need to refer to your user manual for more specific instructions.
You can use the ZTX box to reset a t528g Samsung.
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The best way to reset a Samsung GT-C3300K phone is to do a master reset. A master reset can be performed within the settings feature of the phone.
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This monitor does support DVI outputs.
Go onto the website or samsung dealer