3M MP8790 manual Phenomena That May Easily Be Mistaken for Machine Defects, Phenomenon

WHAT TO DO WHEN YOU THINK A MACHINE DEFECT HAS OCCURRED (continued)

Phenomena That May Easily Be Mistaken for Machine Defects

Before requesting repair, check in accordance with the following chart. If the situation cannot be corrected, then contact your dealer.

Phenomenon	Cases not involving a machine defect	Items to be confirmed	Reference
			Page(s)
	The main power source is not ON.	Turn on the main power.	3, 15
	The electrical power cord is not plugged in.	Correctly connect the power cord.
Power does not		Be sure to press the “O” (power OFF) side
come ON	The main power source has been	of the main power switch, and leave this OFF	15
	interrupted during operation, such as by	for approximately 20 minutes. After the unit
	a power outage (blackout), etc.	has sufficiently cooled down, turn ON the
		power source.
No sound or	The input changeover settings	Select the input signal, and	16
	are mismatched.	correct the settings.
pictures are
outputted	No signal is being inputted.	Correctly connect the connection cord.	8-12
	The electrical wiring to this unit	Correctly connect the connection cord.	8-12
	is not correctly connected.
Pictures are
	The volume setting has been set at (or		18
displayed, but no		Adjust the VOLUME setting to a higher level.
	adjusted to) an extremely low level.
sounds are heard
	The MUTE mode is the current setting.	Press the MUTE button to release	18
		(change) the MUTE mode setting.
	The electrical wiring to this unit	Correctly connect the connection cord.	8-12
Sounds are	is not correctly connected.
heard, but no	The brightness setting has been set at	Adjust the BRIGHT setting to a	26
pictures are	(or adjusted to) an extremely low level.	brighter level.
displayed
	The lens cap has not been removed.	Remove the lens cap.	15
Colors have a faded-		Perform picture adjustments by changing the	27
out appearance	Color depth setting or color tone setting	COLOR BAL R, the COLOR BAL B, and/or the
Color tone is poor		TINT settings, etc.
	The brightness setting and/or contrast	Perform picture adjustments by changing the	26
	setting has not been properly adjusted.	BRIGHT and/or CONTRAST settings, etc.
Pictures appear	The WHISPER mode is the current	Change (by releasing) from the	31
dark	setting.	WHISPER mode.
	Lamp is approaching the end of its	Exchange the old lamp with a new	33, 34
	product lifetime.	lamp.
Pictures appear	Either the FOCUS setting or the H	Adjust the FOCUS and H PHASE settings.	16, 27
blurry	PHASE is not properly adjusted.
Input signal changes	INPUT dial is set between the click	Turn the INPUT dial and set it at the	16
with no-operation.	points.	click point.

NOTE

Although bright spots or dark spots may appear on the screen, this is a unique characteristic of liquid crystal displays, and such do not constitute or imply a machine defect.

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