Samsung SP-P400B - Manual (Page 17)

Setting up the PC Environment - Check the following items before connecting your PC to your projector.
1. Click the right mouse button on the Windows desktop
and click on [Properties].
<Display Properties> tab will appear.
2. Click on [Settings] tab and set the <Screen resolution> by
referring to <Resolution> described in the display mode
table supported by this projector.
You do not have to change <Color quality> setup.
3. Press the [Advanced] button.
Another property window will appear.
4. Click on [Monitor] tab and set the <Screen refresh rate> by
referring to <Vertical Frequency> described in the Supported
Resolution/Size Modes table .
Set up both the vertical and horizontal frequency instead of
<Screen refresh rate>.
5. Click the [OK] button to close the window, and click the
[OK] button of the <Display Properties> window to close the
window.
The computer may restart automatically.
6. Shut down the PC and connect to the projector.
Process might vary depending on the type of computers or Windows versions.
(For example, [Properties] appears instead of [Properties (R)] as shown in 1.)