ViewSonic VPW450HD manual Troubleshoot Common Conditions, Symptom Possible Cause Remedy

TROUBLE SHOOTING

Troubleshoot Common Conditions

The following list represents possible anomalies that you may encounter and methods for remedy. Please refer to this checklist prior to contacting a service representative.

Symptom	Possible Cause		Remedy
No picture is displayed	1.	The power cord is disconnected.	1.	Plug in the power cord.
	2.	The main power switch on the back of the dis-	2.	Make sure the power switch is switched
		play is not switched on.		on.
	3.	The selected input has no connection.	3.	Connect a signal connection to the dis-
	4.	The display is in standby mode in RGB mode.		play.
			4.	Press any key on your keyboard.
Interference displayed on the	1.	Caused by surrounding electrical appliances,	1.	Move the display to another location to
display or audible noise is heard		cars/motorcycles or fluorescent lights.		see if the interference is reduced.
Color is abnormal	1.	The signal cable is not connected properly.	1.	Make sure that the signal cable is attached
				firmly to the back of the display.
Picture is distorted with	1.	The signal cable is not connected properly.	1.	Make sure that the signal cable is attached
abnormal patterns	2.	The input signal is beyond the capabilities of the		firmly.
		display.	2.	Check the video signal source to see if it
				is beyond the range of the display. Please
				verify its specifications with this display’s
				specification section.
Display image does not fill up	1. If under RGB mode, the H-Size and V-Size is		1.	Use H-Size and V-Size to adjust the size
the full size of the screen		incorrectly set.		of the video.
	2.	If under TV, AV1, AV2, or Component with	2.	Use the WIDE key to scroll through vari-
		480i input, the 4:3 WIDE mode is switched on.		ous full screen modes.
Can hear sound, but no picture	1.	Improperly connected source signal cable.	1.	Make sure that both video inputs and
				sound inputs are correctly connected.
Can see picture but no sound is	1.	Improperly connected source signal cable.	1.	Make sure that both video inputs and
heard	2.	Volume is turned all the way down.		sound inputs are correctly connected.
			2.	Use VOLUME +/- to hear sound.
	3.	MUTE is turned on.	3.	Switch MUTE off by using the MUTE
				button.
Some picture elements do not	1. Some pixels of the plasma display may not turn		1.	This display is manufactured using an
light up		on.		extremely high level of precision technol-
				ogy; however, sometimes some pixels of
				the display may not display. This is not a
				malfuction. Please see the enclosed war-
				ranty card for more information.
After-Images can still be seen	1.	A still picture is displayed for an over extended	1.	Do not allow a still image to be displayed
on the display after the display		period of time.		for an extended period of time as this can
is powered off. (Examples of				cause a burn in.
still pictures include logos,
video games, computer images,
and images displayed in 4:3
normal mode)

38ViewSonic VPW450HD