BenQ CP120 manual Troubleshooting, Projector does not turn on, No picture, Image is unstable

Page 59

Troubleshooting

The projector does not turn on.

	Cause	Remedy

		Plug the power cord into the AC inlet on the
	There is no power from the power	projector, and plug the power cord into the
	There is no power from the power	power outlet. If the power outlet has a switch,
	cable.	power outlet. If the power outlet has a switch,
	cable.	make sure that it is switched on. See "Start
		make sure that it is switched on. See "Start
		up" on page 21 for details.

	Attempting to turn the projector on	Wait until the cooling down process has
	Attempting to turn the projector on	completed. See "Shutdown" on page 27 for
	again during the cooling process.	completed. See "Shutdown" on page 27 for
	again during the cooling process.	details.
		details.

No picture.

	Cause	Remedy

	The video source is not turned on or	Turn the video source on and check that the
	The video source is not turned on or	signal cable is connected correctly. See
	connected correctly.	signal cable is connected correctly. See
	connected correctly.	"Connection" on page 16 for details.
		"Connection" on page 16 for details.

	The projector is not correctly	Check the connection. See "Connection" on
	connected to the input source device.	page 16 for details.

		Select the correct input signal with the
	The input signal has not been	SOURCE button on the projector or remote
	correctly selected.	control. See "Switching input signal" on page
		26 for details.

	The lens cover is not open.	Slide open the lens cover.

Image is unstable.

Cause	Remedy

The connection cables are not	Correctly connect the cables to the
securely connected to the projector or	appropriate terminals. See "Connection" on
the signal source.	page 16 for details.

Image is blurred.

	Cause	Remedy

	The projection lens is not correctly	Adjust the focus of the lens using the focus
	The projection lens is not correctly	ring. See "Fine-tuning the image size and
	focused.	ring. See "Fine-tuning the image size and
	focused.	clarity" on page 24 for details.
		clarity" on page 24 for details.

		Adjust the projection angle and direction as
	The projector and the screen are not	well as the height of the unit if necessary. See
	aligned properly.	"Obtaining a preferred projected image size"
		on page 12 for details.

	The lens cover is not open.	Slide open the lens cover.

Troubleshooting 51

Image 59

Contents Welcome Software license agreement CopyrightDisclaimer Copyright Memo Table of Contents Iv Table of Contents Fine-tuning the image size and clarityTable of Contents Dimensions Timing chartMemo Vi Table of Contents Important safety instructions Important safety instructionsBut could fail if power cuts or surges Safety instructions Other item Do not block the ventilation holesFollowing environments Do not place this unit on a blanket Bedding or any other soft surfaceSafety instructions Introduction Projector featuresIntroduction Shipping contents Lower side Projector exterior viewFront / Upper side Rear sideTurns the projector on or off Introduction Controls and functionsExternal control panel Adjusts the focus of the projected image Turns the projector on or off Remote control descriptionDown on the remote control Press this button to display the Wireless Connection menuInstalling or replacing the remote control battery Remote control effective rangeEquipment Positioning your projectorChoosing a location Obtaining a preferred projected image sizeSelect your screen size Positioning your projector Screen Center of lens Projection distance Screen size chartMaximum Minimum Zoom Connection Connecting a computerConnection Best video quality Connecting Video source devicesComponent Video to VGA D-Sub adaptor cable Device Connecting a Component Video source deviceVideo cable Device Connecting an S-Video source deviceConnecting a composite Video source device Start up Using the projectorSwitch all of the connected equipment on Using the projectorTo set a password Utilizing the password functionTo change the password If you forget the passwordTo enter the password recall procedure That you need using the zoom ring Focus ring Adjusting the heightAuto-adjusting the image Fine-tuning the image size and clarityRight buttons on Correcting keystoneManual keystone correction Automatic keystone correction Selecting an application modeSwitching input signal Hiding the imageShutdown Disconnect the power cord from the wall socketRemote paging operations Freezing the imageHardware and software requirements Using the wireless functionsAbout wireless connection modes and channels Checking the TCP/IP settings of your computer Preparing your computer for wireless connectionInstalling Wireless Wizard Making wireless presentationClick to select a wireless network card from the list Current wireless connection channel Page Freezing image Controlling presentationMethod 2 Projector control DisconnectingMenu system Menu operationUsing the menus Picture menu Depends on Selected Application ModeKeystone Color TempPro-Picture menu Setting menu Advance menu Periods of time 10hours without shutdown Turned off. Selecting Off disables this functionAuto Off Off EconomicSource ResolutionMode Equivalent Information MenuCare of the projector MaintenanceMessage Status Calculation of lamp hourReplacing the lamp Resetting the lamp counter Temperature informationPowering up IndicatorsProjector needs to cool after the power is Turned off Stand-by modeMaintenance Image is unstable TroubleshootingProjector does not turn on No pictureNearby Remote control does not workUnable to use wireless connection ConfiguredProjector specifications SpecificationsSupported timing for PC input DimensionsTiming chart Horizontal Vertical Pixel Resolution Frequency Mode KHz MHzSupported timing for Video and S-Video inputs Signal Format Horizontal Frequency Vertical Frequency KHzSupported timing for Component-YPbPrInput Warranty WarrantyLimited warranty MIC statement Regulation statementsFCC statement EEC statementMemo Regulation statements