Canon LV-7255 manual Appendix, Problem Check These Items

	7. Appendix
Common Problems & Solutions (See also "POWER/WARNING/LAMP Indicator" on page 53.)
Problem	Check These Items
Does not turn on	• Check that the power cord is plugged in and that the power button on the projector cabinet or the remote
	control is on. See pages 19 and 20.
	• Ensure that the lamp cover is installed correctly. See page 51.
	• Check to see if the projector has overheated or the lamp usage exceeds 2100 hours (up to 3100 hours : Quiet
	mode). If there is insufficient ventilation around the projector or if the room where you’re presenting is par-
	ticularly warm, move the projector to a cooler location.
	• The lamp may fail to light. Wait a full minute and then turn on the power again.
	• The lamp has reached the end of its usable life. Replace the lamp.
Will turn off	• Ensure that the Power management or Off timer is off. See page 45.
No picture	• Use the INPUT button to select your source (Computer 1, Computer 2, Video or S-Video). See page 22. If there
	is still no picture, press the button again.
	• Ensure your cables are connected properly.
	• Use menus to adjust the brightness and contrast. See page 40.
	• Remove the lens cap.
	• Reset the settings or adjustments to factory preset levels using the “Factory default” in the Menu. See page 47.
	• Enter your registered Password if the Password function is enabled. See page 44.
	• When using with a notebook PC, be sure to connect between the projector and the notebook PC before turning
	on the power to the notebook PC. In most cases signal cannot be output from RGB output unless the notebook
	PC is turned on after connecting with the projector.
	* If the screen goes blank while using your remote control, it may be the result of the computer's screen-
	saver or power management software.
	• See also the next page.
Picture suddenly	• When the room where you' re presenting is particularly warm → Move the projector to a cooler location.
becomes dark
Color tone or Color	• Check if an appropriate color is selected in "Screen color". If so, select an appropriate option. See page 39.
balance is unusual	• Adjust "Color balance" in "Image adjustment". See page 40.
Image isn’t square to	• Reposition the projector to improve its angle to the screen. See page 23.
the screen	• Use the Keystone correction function to correct the trapezoid distortion. See page 25.
Picture is blurred	• Adjust the focus. See page 24.
	• Reposition the projector to improve its angle to the screen. See page 23.
	• Ensure that the distance between the projector and screen is within the adjustment range of the lens. See page
	12.
	• Condensation may form on the lens if the projector is cold, brought into a warm place and is then turned on.
	Should this happen, let the projector stand until there is no condensation on the lens.
Image is scrolling	• Use the INPUT button to select your source (Computer 1, Computer 2, Video or S-Video). See page 22.
vertically, horizontally	• Adjust the computer image manually with the Horizontal/Vertical position in the “Advanced settings → Page
or both	2”. See page 45.
Remote control does	• Install new batteries.See page 10.
not work	• Make sure there are no obstacles between you and the projector.
	• Stand within 7 m (22 feet) of the projector. See page 10.
Indicator is lit or	• See the POWER/WARNING/LAMP Indicator on page 53.
blinking
Cross color in RGB	• Press the AUTO PC button on the projector cabinet or the remote control. See page 27.
mode	• When “Off” is selected in “Auto PC adjustment”, adjust the computer image manually with “Clock” and “Track-
	ing” in “Advanced settings” → “Page 2” in the menu. See pages 45 and 46.
Whenever the projector	• Clean or replace the filter and then reset the Filter counter. See page 47.
is turned on, a message
prompting you to clean
the filter will be dis-
played

For more information contact your dealer.

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