NEC Projector P452H User Manual

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❾ Troubleshooting Check List
Before	contacting	your	dealer	or	service	personnel,	check	the	following	list	to	be	sure	repairs	are	needed	also	by	
referring	to	the	“Troubleshooting”	section	in	your	user’s	manual.	This	checklist	below	will	help	us	solve	your	problem	
more	efficiently.
*	 Print	this	page	and	the	next	page	for	your	check.
Frequency of occurrence □ always □	sometimes	(How	often?_____________________)	□	other	(__________________)
Power
□	No power (POWER indicator does not light blue)� See also “Status Indicator (STATUS)”�
□	Power	cord’s	plug	is	fully	inserted	into	the	wall	outlet.
□	Lamp cover is installed correctly�
□	
Lamp Hours Used (lamp operation hours) was cleared after 
lamp replacement�
□	No power even though you press and hold the POWER button�
□	Shut down during operation�
□	Power	cord’s	plug	is	fully	inserted	into	the	wall	outlet.
□	Lamp cover is installed correctly�
□	[AUTO POWER OFF] is turned off (only models with the [AUTO POWER OFF] function)�
□	[OFF TIMER] is turned off (only models with the [OFF TIMER] function)�
Video and Audio
□	No image is displayed from your PC or video equipment to the projector�
□	Still no image even though you connect the projector to the PC first, then start the PC�
□	Enabling	your	notebook	PC’s	signal	output	to	the	projector.
•	 A	combination	of	fu nction	ke ys	wi ll	en able/disable	th e	ex ter-nal	display.	Usually,	the	combination	of	the	“Fn”	key	along	with	one	of	the	12	function	keys	turns	the	external	display	on	or	off.	
□	No image (blue or black background, no display)�
□	Still no image even though you press the AUTO ADJUST button�
□	
Still no image even though you carry out [RESET] in the projector’s	menu.
□	Signal	cable’s	plug	is	fully	inserted	into	the	input	terminal
□	A message appears on the screen�(	_____________________________________________	)
□	The source connected to the projector is active and available�
□	Still no image even though you adjust the brightness and/or the contrast�
□	Input	source’s	resolution	and	frequency	are	supported	by	the	projector�
□	Image is too dark�
□	Remains unchanged even though you adjust the brightness and/or the contrast�
□	Image is distorted�
□	Image appears to be trapezoidal (unchanged even though you carry out the [KEYSTONE] adjustment)�
□	Parts of the image are lost�
□	Still unchanged even though you press the AUTO ADJUST button�
□	Still unchanged even though you carry out [RESET] in the projector’s	menu.
□	Image is shifted in the vertical or horizontal direction�
□	Horizontal and vertical positions are correctly adjusted on a computer signal�
□	Input	source’s	resolution	and	frequency	are	supported	by	the	projector�
□	Some pixels are lost�
□	Image is flickering�
□	Still unchanged even though you press the AUTO ADJUST button�
□	Still unchanged even though you carry out [RESET] in the projector’s	menu.
□	Image shows flickering or color drift on a computer signal�
□	Still unchanged even though you change [FAN MODE] from [HIGH] to [AUTO]�
□	Image appears blurry or out of focus�
□	Still	unchanged	even	though	you	checked	the	signal’s	resolution	on	PC	and	changed	it	to	projector’s	native	resolution.
□	Still unchanged even though you adjusted the focus�
□	No sound�
□	Audio cable is correctly connected to the audio input of the projector�
□	Still unchanged even though you adjusted the volume level�
□	AUDIO OUT is connected to your audio equipment (only models with the AUDIO OUT terminal)�
Other
□	Remote control does not work�
□	No obstacles between the sensor of the projector and the remote control�
□	Projector is placed near a fluorescent light that can disturb the infrared remote controls�
□	ID for the projector and for the remote are same�
□	Buttons on the projector cabinet do not work (only models with the 
[CONTROL PANEL LOCK] function)
□	[CONTROL PANEL LOCK] is not turned on or is disabled in 
the menu�
□	Still unchanged even though you press and hold the EXIT button for a minimum of 10 seconds�
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In the space below please describe your problem in detail.
Information on application and environment where your projector is usedInstallation environment
Screen size: inch
Screen type:   □ White matte □ Beads □ Polarization 
□
 Wide angle □ High contrast
Throw distance: feet/inch/m
Orientation: □ Ceiling mount □ Desktop
Power outlet connection: □
 Connected directly to wall outlet
□ Connected to power cord extender or other (the 
number	of	connected	equipment______________)
□ Connected to a power cord reel or other (the number 
of	connected	equipment______________)
Computer
Manufacturer:
Model number:
Notebook PC □ / Desktop □
Native resolution:
Refresh rate:
Video adapter:
Other:
Video	equipment
VCR, DVD player, Video camera, Video game or other
Manufacturer:
Model number:
Signal cable
NEC	standard	or	other	manufacturer’s	cable?
Model number:      Length:    inch/m
Distribution amplifier Model number:
Switcher Model number:
Adapter Model number:
ProjectorPC
DVD player
Projector Model number:
Serial No�:
Date of purchase:
Lamp operating time (hours):
ECO MODE: □ OFF □ AUTO ECO
 □ NORMAL □ ECO
Information on input signal:
Horizontal synch frequency [     ] kHz
Vertical synch frequency [    ] Hz
Synch polarity H □ (+) □ (−)
 V □ (+) □ (−)
Synch type □ Separate □ Composite
 □ Sync on Green
STATUS Indicator:
Steady light □ Orange □ Green
Flashing light [     ] cycles
Remote control model number:
9. Appendix  
						

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❿ REGISTER YOUR PROJECTOR! (for residents in the United 
States, Canada, and Mexico)
Please	take	time	to	register	your	new	projector.	This	will	activate	your	limited	parts	and	labor	warranty	and	InstaCare	
service	program.
Visit	our	web	site	at	www.necdisplay.com,	click	on	support	center/register	product	and	submit	your	completed	for m	online.
Upon	receipt,	we	will	send	a	confirmation	letter	with	all	the	details	you	will	need	to	take	advantage	of	fast,	reliable	
warranty	and	service	programs	from	the	industry	leader,	NEC	Display	Solutions	of	America,	Inc.
9. Appendix  
						

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