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© 3M 1999 3M
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Multimedia Projector MP8780
ENGLISH
21
Section 7: Troubleshooting
Error Message Displays
NO SIGNAL IS
DETECTED.
INVALID.
CHANGE THE LAMP.
LIFE: 50 HS
CHANGE THE LAMP.
NO LIFE.
Cause
The projector is not detecting a signal.
The horizontal frequency of input signal
exceeds projector capability.
Lamp operation time is greater than 950
hours.
Lamp operation time is greater than 1,000
Solution
Check cable connections to input device. Input device not
connected to this input mode, switch to next mode.
Switch projector to correct resolution.
See Appendix A.5
Change the projector lamp and reset the lamp operation
hours to zero.
Change the projection lamp and reset the lamp operation
hours to zero.
7.2 Message/Solution Table
Symptom Cause Solution
Power cannot be • The Main power 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.
• 90 seconds have not elapsed since • Wait 90 seconds before turning on power.
the power was turned off.
No picture and 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 with no • RGB/Video/Audio wiring to projector • Connect the cable to correct input/output source.
picture. is not correct.
• Lens cap is on. • Remove lens cap.
Picture is displayed with • Audio wiring to projector is not correct. • Connect the cable to correct input/output source.
no sound. • The volume is set to minimum. • Press the VOL button to increase Volume.
• The unit 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 incorrectly.
• 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 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.
Cover indicator red. • Air filter door on bottom of case
• Ensure air filter door is closed.
is open.
TEMP indicator • Temperature inside projector • Clear blocked ventilation holes.
red. is too hot. • Clean air filter.
7.1 Symptom/Solution Table