|You have not provided anywhere near enough information.|
ViewSonic PJ560D has these ports:
Audio Input - Stereo mini jack
Audio Out - Stereo mini jack
RGB Input - 15-pin HD, D-sub (x2)
Composite Input - RCA jack
S-Video Input - Mini-DIN 4-pin
Component Video Input: VGA DB-15 to HDTV/component cable*
RS-232 - 6-pin D-sub
RGB Output - 15-pin HD, D-sub
Which ports are you trying to use on the ViewSonic PJ560D and the laptop??
Did you READ the directions for how to hook up the ViewSonic PJ560D, and activate it in Windows ??
Once you have hooked up the ViewSonic PJ560D correctly, it may not be activated (turned on so that Windows recognizes it) in Windows automatically - you may need to go to (Control Panel - ) Display Properties - Settings, and RIGHT click on the display icon for the projector and select something to activate it in Windows.