Troubleshooting - ViewSonic PJ750 User Manual

Troubleshooting

No power
• Make sure power button (or switch) is ON.
• Make sure A/C power cord is securely connected to a power outlet.
• Plug another electrical device (like a radio) into the power outlet to verify that the outlet is
E
supplying proper voltage.
N
G
Power is on but the projector displays only the logo
L
I
• Make sure the input source is connected.
S
H
Projector image is too dark or too light
• Adjust the Contrast and Brightness settings.
• Press Reset from the OnView
Projector image is completely black (no light coming from the lamp)
• Make sure the lens cover is open.
• Make sure the power cord is connected and the unit is turned on. The LED should be steady green.
• Adjust Contrast and Brightness.
• The projector may have overheated. Let the unit cool down.
• Make sure ventilation openings are clear.
• Make sure air-filters are clean.
• Replace the lamp module.
The image appears unstable or misplaced
• Press Auto.
• Check that the resolution is compatible between the input device and the projector. See the
manufacturer's instructions for your specific input device.
• If the projector is connected to a source with a non-standard computer or video card, adjust the
frequency of the computer signal.
The image is out of focus
• Adjust the focus.
• Make sure that the projection distance is at least 5 feet.
• Make sure the lens is clean.
• Adjust the H Phase.
Cooling fan is not working when the lamp is lit
• Have the projector repaired by an authorized dealer.
Caution: Do not operate the projector in this condition.
The lamp shuts off
• A minor power surge can cause the lamp to shut off. Turn off the Power switch. Let the projector
cool down, then restart.
• The projector may have overheated. Allow the projector to cool down, then restart.
• Recheck the power cord connection.
• Replace the lamp module.
16 ViewSonic PJ750
display menu to reset factory defaults.
®