Troubleshooting - Mitsubishi Electric HC900 User Manual

Troubleshooting

Before asking for repair of the projector, check the following. If the symptom persists, stop using the projector, be
sure to unplug the power plug, and then contact your dealer.
No image appears on the screen.
Problem
Power can not be
turned on.
No image appears on
the screen.
Projected images
suddenly disappear.
EN-32
Solution
• Check whether the indicators are on or off and how they are lightning.
POWER STATUS Solution
• Connect the power cord to the projector.
Off
Off • Plug the power cord into a wall outlet.
• If any objects are blocking the air inlet or outlet grille, remove them and
carry out the following.
1. Unplug the power cord from the wall outlet.
Off
2. Make sure that the projector has cooled off.
3. Plug the power cord into the wall outlet.
4. Press the POWER button.
• If any objects are blocking the air inlet or outlet grille, remove them.
• Don't expose the air outlet grilles to hot air emitted from a heating appliance.
Steady red Blinking
orange
• After the STATUS indicator stops blinking, press the POWER button.
• If you unplug the power cord while the fan is rotating, the lamp may not turn on about one minute
Blinking
when you plug the power cord next time.
green
• The lamp can't turn on again for one minute after it goes out.
• Press the POWER button several times.
• Replace the lamp. (The lamp is at the end of its life.)
Steady red
• Attach the lamp cover on the bottom.
Off
Blinking
• Unplug the power cord from the wall outlet and contact your dealer.
red / green
Steady
or
Blinking
• Check that the lens cap is removed.
• It may take about one minute for the lamp to light up.
• The lamp fails to light up on rare occasions. In such a case, wait for a few minutes
and then try again.
• If the projector was turned off before the lamp was cooled down sufficiently last
time, the fan may start rotating and the POWER button may not work after the
power cord is plugged. After the fan stops rotating, press the POWER button to
turn back on the POWER indicator.
• Check that the intake vent is clean.
• Check that the lamp cover is closed. (See Page 31.)
• Check that the cables connected to the external devices are not broken.
• When an extension cable is being used, replace it with the supplied cable for
check. When images are displayed correctly, add an RGB signal amplifier to the
extension cable.
• This problem may occur when the intake vent and/or exhaust vents are blocked.
(In such a case, the STATUS indicator brink orange.)
➔ Remove the objects blocking the intake vent and/or exhaust vents and then
carry out the following procedure.
1. Wait for the intake fan and/or exhaust fan to stop. (Wait until the STATUS
indicator goes out.)
2. Unplug the power cord from the wall outlet.
3. Wait about 10 minutes.
4. Plug the power cord into the wall outlet.
5. Press the POWER button.
• When the STATUS indicator is steady red, it is indicating that the lamp should
be replaced. Replace the lamp in this case.