VIEWSONIC Precision VS11856 - Manual (Page 52)

Troubleshooting
If you think something is wrong, check the followings before contacting customer service.
If This Happens Check
No power
* Is the power cord or battery pack plugged in?
* Is it connected to the projector?
Power is lost during use
* Is the ambient temperature high?
* Is the air intake or air exhaust blocked?
No picture
* Is the projector turned on?
* Are the connections set up correctly?
* Are all the connected devices functioning properly?
Picture not displayed correctly
* Is the input signal supported by the projector? ,
* Is something generating an abnormal video signal,
for instance the video tape?
Picture blurred Part of picture out of
focus
* Is the lens dirty?
* Is the lens focus adjusted optimally?
* Is the projection distance within the projector’s
supported range?
* Is the projector’s screen placement angle tilted too
far?
* Are the sharpness or sampling phase adjustments
off?
Colors too light
Bad shading
* Are the color or tint, adjustments off?
* Is the screen dirty?
List of Compatible Signals
Analog PC timing
Mode Resolution V-Sync H Sync
VGA
DOS/Text mode
visible
640 x 480 50 Hz 24.69 kHz
640 x 480 60 Hz 31.5 kHz
640 x 480 72 Hz 37.9 kHz
640 x 480 75 Hz 37.5 kHz
640 x 480 85 Hz 43.3 kHz
SVGA 800 x 600 50 Hz 30.99 kHz
800 x 600 56 Hz 35.2 kHz
800 x 600 60 Hz 37.9 kHz
800 x 600 72 Hz 48.1 kHz
800 x 600 75 Hz 46.9 kHz
800 x 600 85 Hz 53.7 kHz
XGA 1024 x 768 50 Hz 39.63 kHz
1024 x 768 60 Hz 48.4 kHz
1024 x 768 70 Hz 56.5 kHz
1024 x 768 75 Hz 60.0 kHz
1024 x 768 85 Hz 68.7 kHz
WXGA 1280x768 60 Hz 47.8 kHz
SXGA 1280 x 1024 64.0 kHz 60 Hz
1280 x 1024 80.0 kHz 75 Hz
Coordinated Video
Timing
640 x 480 67 Hz 35 kHz
832 x 624 75 Hz 49.72 kHz
1024 x 768 75 Hz 60.24 kHz