Section 7: Troubleshooting

7.1 Symptom/Solution Table

Symptom

 

Cause

Solution

Power cannot be turned

The main power is not turned on.

• Turn on the MAIN POWER SWITCH.

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 and sound.

The setting of the input source is

• Set the correct input using the input select button of

 

 

not correct.

the projector or the remote control.

 

RGB/Video/Audio wiring to

• Connect the cable to correct input/output source.

 

 

projector is not correct.

 

 

 

 

 

Sound is heard with no

RGB/Video/Audio wiring to

• Connect the cable to correct input/output source.

picture.

 

projector is not correct.

• Press the MENU button and increase BRIGHTNESS.

 

The brightness is set fully to dark.

 

Lens cap is on.

• Remove lens cap.

 

 

 

 

Picture is displayed with

Audio wiring to projector is not

• Connect the cable to correct input/output source.

no sound.

 

correct.

• Press the VOL button to increase Volume.

 

The volume is set to minimum.

 

The unit is muted.

• Press the MUTE button.

 

PinP is on and audio is switched to

• Press VOLUME and move DISC PAD to switch to

 

 

VIDEO mode.

audio input.

 

 

 

 

Color is weak and tint is

The color and tint have been

• Adjust the color and tint correctly.

incorrect.

 

adjusted incorrectly.

 

 

 

 

 

Picture is dark.

The brightness and contrast has

• Adjust the brightness and contrast correctly.

 

 

not been adjusted correctly.

• Replace the lamp with a new one.

 

The lamp needs to be replaced.

 

 

 

 

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

red.

 

 

restart.

 

 

 

• If problem persists call your dealer.

 

 

 

 

• Temperature inside projector is too

• Clear blocked ventilation holes.

 

 

hot.

• Clean air filter.

 

 

 

 

LAMP indicator blinks

Lamp access door on bottom of

• Ensure lamp access door is closed.

red.

 

case is open.

 

 

 

 

 

• The lamp operating hours have

• Replace the lamp.

 

 

reached maximum operating hours.

 

 

 

 

TEMP indicator blinks

• Cooling fan not operating.

• Contact your dealer.

red.

 

 

 

ENGLISH

© 3M 2000

3MMultimedia Projector MP8755/MP8755L/MP8770/MP8770L

23

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3M MP8770/MP8770L, MP8755/MP8755L manual Troubleshooting, Symptom/Solution Table, Symptom Cause Solution

MP8755/MP8755L, MP8770/MP8770L specifications

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