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3M
™
Multimedia Projector MP7640
24
© 3M IPC 2000
Section 7: Troubleshooting
Symptom Cause Solution
Power cannot be • MAIN POWER switch is not turned on. • Turn the MAIN POWER switch on.
turned on. • The power cord is disconnected. • Insert the power cord into an AC socket.
• 60 seconds have not elapsed since • Wait 60 seconds before turning on power.
the power was turned off.
No picture or sound. • The setting of the input source is not • Set the correct input using the input select button of
correct. the projector or the remote control.
• RGB/Video/Audio wiring to projector is • Connect the cable to correct input/output source.
not correct.
Sound is heard without • RGB/Video/Audio wiring to projector • Connect the cable to correct input/output source.
picture. is not correct.
• The brightness is set fully to dark. • Press the MENU button and increase BRIGHTNESS.
• Lens cap is on. • Remove lens cap.
Picture is displayed • Audio wiring to projector is not correct. • Connect the cable to correct input/output source.
without sound. • The volume is set to minimum. • Press the VOL button to increase Volume.
• The volume is muted. • Press the MUTE button.
Color is weak and tint is • The color and tint have been adjusted • Adjust the color and tint correctly.
incorrect. incorrectly.
Picture is dark. • The brightness and contrast has not • Adjust the brightness and contrast correctly.
been adjusted correctly.
• The lamp needs to be replaced. • Replace the lamp with a new one.
Picture is not clear. • Projector is out of focus. • Adjust the focus and H. PHASE.
LAMP indicator lights • Lamp will not ignite.
• Turn off power and let cool for 20 minutes, then restart.
red.
• If problem persists call your dealer.
• Temperature inside projector is too hot. • Check and clear blocked ventilation holes.
• Check and clean air filter.
LAMP indicator blinks • Lamp access door on bottom of case
• Ensure lamp access door is closed.
red. is open.
• The lamp usage has reached • Replace the lamp.
maximun operating hours.
TEMP indicator blinks • Cooling fan not operating. • Contact your dealer.
red.
Error Message Displays
NO INPUT IS DETECTED.
SYNC IS OUT OF RANGE.
CHANGE THE LAMP.
AFTER REPLACING
LAMP, RESET THE LAMP
TIME.
CHANGE THE LAMP.
AFTER REPLACING
LAMP, RESET THE LAMP
TIME.THE POWER WILL
TURN OFF AFTER * HR.
CHANGE THE LAMP.
(blinking)
Cause
The projector is not detecting a signal.
The horizontal frequency of input signal
exceeds projector capability.
Nearing end of normal lamp operating time.
Remaining lamp operation time = 20 hours
or less.
*Indicates number of hours until power turns
off automatically.
Normal lamp operating time has expired.
Safety feature shuts projector down after 10
minutes.
Solution
Check cable connections to input device. If input device
not connected to this input mode, switch to next mode.
Switch projector to correct resolution.
See Appendix.
Change the projector lamp and reset the lamp operation
hours to zero.
Change the projection lamp and reset the lamp operation
hours to zero.
Change the projector lamp and reset the lamp operation
hours to zero.
Messages/Solutions
Symptoms/Solutions