Sony VPL-CX20 User Manual

35

Troubleshooting

Others

B Others

If the projector appears to be operating erratically, try to diagnose and correct the problem using 
the following instructions. If the problem persists, consult with qualified Sony personnel.

The power is not turned on. • The power has been turned off and on with the ?/1 key at a short 

interval.
c Wait for about 45 seconds before turning on the power 

• The lamp cover is not secured.

c Close the lamp cover securely (see page 33).

• The air filter cover is detached.

c Attach the air filter cover securely (see page 34).

Both the LAMP/COVER 
and TEMP/FAN indicators 
light up.

The electrical system has broken down.
c Consult with qualified Sony personnel.

The powered tilt adjuster is 
not retracted into the 
projector.

The AC power cord was unplugged with the power of the projector 
turned on.
c Connect the power cord to the AC outlet again, turn on the power 

of the projector, then turn it off.

No picture.

• A cable is disconnected or the connections are wrong.

c Check that the proper connections have been made (see page 9).

• The connections are wrong.

c This projector is compatible with DDC2B (Digital Data 

Channel 2B). If your computer is compatible with DDC, turn 
the projector on according to the following procedures.
1 Connect the projector to the computer.
2 Turn the projector on.
3 Start the computer.

• Input selection is incorrect.

c Select the input source correctly using the INPUT key (see 

• The computer signal is not set to output to an external monitor or 

set to output both to an external monitor and a LCD monitor of a 
computer.
c Set the computer signal to output only to an external monitor.
c Depending on the type of your computer, for example a 

notebook, or an all-in-one LCD type, you may have to switch 
the computer to output to the projector by pressing certain keys 
or by changing your computer’s settings.
For details, refer to the computer’s operating instructions 
supplied with your computer.