InFocus LP435Z Troubleshooting

If the projector speaker does not output sound, it could be due to a faulty speaker or a problem with the audio connection to the projector.

The speaker may have become faulty after use. The power supply board needs to be replaced since the speaker is built into the power supply.

First remove the lens cap if it is on. If this doesn't work then reseat the lamp. Remove the lamp and place it back in. If this doesn't work then the lamp needs to be replaced. If replacing the lamp doesn't work you may need to replace the power supply board.

The power cord could be broken. Replace the power cord and/or change the outlet.

If the fans are producing an above average level of noise, the projector is probably overheating due to dust clogging the air vents. Try cleaning the air filter grate. If the problem persists replace the main fan and/or the secondary fan.

The projector is being overworked and the fan will run faster to keep the projector cool. Clean and vacuum the vents since the dust can hinder the air flow in the projector. Lowering the brightness of the projector could help as well, since the lamp would then operate at a lower temperature.

Possible causes are:

The projector may be unfocused. Refocus the image by rotating the zoom and focus rings around the lens of the projector.

The lens could have a lot of dust covering it. Wipe the lens with a clean, lint-free cloth and remove all the dust. If this doesn't work then the lens must be replaced.

If the projected image is dim and the lens is clear of dust and the surface being projected upon is clean and reflective (i.e a white screen), there could be a problem with the DLP board. Try replacing the DLP board.

The lighting from other sources may be brighter than the image from the projector. Dim the lights in the room by turning off lights and closing curtains or blinds.

As the lamp is used, its maximum brightness. Replacing the lamp could improve the brightness of the projector.

First try another outlet and/or power wire to be sure the disruption is coming from the projector. If this is the case the problem is most likely a faulty power supply. See InFocus LP435Z Power Supply Replacement.