Toshiba TDP-T420 Owner's Manual page 26

Troubleshooting
If you think something is wrong, check the followings before contacting customer service.
Please see "Trouble indications" p.49 as well.
If This Happens
No power • Is the power cord plugged in? Is it connected to the projector?
• Is the main power switch turned on?
• Is the outer lamp cover attached properly?
Power goes out • Is the ambient temperature high?
during use
• Is the air intake or air exhaust blocked?
No picture • Is the input source selected correctly? (When [Auto input search]
is [Off])
p.41
• Is the mute function on?
• Is the brightness setting minimized?
• Are the connections set up correctly?
• Are all the connected devices functioning properly?
No audio • Is the mute function on?
• Is the volume setting minimized?
• Are the connections set up correctly?
• Are all the connected devices functioning properly?
Picture not • Is the input signal supported by the projector?
displayed • Is there something generating an abnormal video signal, for
correctly instance the video tape?
Picture blurred • Is the lens dirty?
Part of picture • Is the lens focus adjusted optimally?
out of focus • Is the projection distance within the projector's supported range?
p.21
• Is the projector's screen placement angle tilted too far?
• Are the sharpness or sampling phase adjustments off?
Image is dark
• Are the brightness or contrast adjustments off?
• Is the lamp nearing the end of its service life?
Colors too light • Are the color, tint, R-level, G-level, or B-level adjustments off?
Bad shading • Is the screen dirty?
• Is the blackboard mode set properly?
• Is the lamp nearing the end of its service life?
Control panel key • Is the key lock function on?
doesn't work
Check
p.24
p.46
p.49
p.49
p.32
p.36
p.22 p.23
p.32
p.27
p.22 p.23
p.53 p.54
p.48
p.27
p.21
p.36 p.37
p.36
p.43
p.41
p.43
p.43
50
If This Happens
Remote control
doesn't work
p.36
Check
• Is the remote control code identical with the projector's code?
• Are the remote control's batteries drained?
• Are the batteries inserted into the remote control correctly?
• Is the remote control being used within the effective range?
• Are there any obstructions between the remote control and
projector?
• Are there any fl uorescent or other bright lights shining at the
projector's infrared remote sensor?
51
p.42
p.19
p.19