Panasonic TH-42PW4 operating instructions Troubleshooting, Plasma Display panel Symptoms Check

Troubleshooting

Before you call for service, determine the symptoms and make a few simple checks as shown below.

	Symptoms		Checks
Picture		Sound
			Electrical Appliances
			Cars/Motorcycles
			Fluorescent light
Interface		Noisy Sound
			Volume
			(Check whether the mute function has been
			activated on the remote control.)
Normal Picture		No Sound
			Not plugged into AC outlet
			Not switched on
			PICTURE and BIGHTNESS/Volume setting
			(Check by pushing the power switch or
No Picture		No Sound	stand-by button on the remote control.)
			If a signal with a non-applicable color system
			format, or frequency is input, only the input
			terminal indication is displayed.
No Picture		Normal Sound
			Color controls set at minimum level.
			Color system (see page 28, 29)

No Color

Normal Sound

Plasma Display panel

Symptoms	Check
Some parts of the screen do	The plasma display panel is manufactured using an extremely high level of precision
	technology, however, sometimes some parts of the screen may be missing picture
not light up
	elements or have luminous spots. This is not a malfunction.
	Do not allow a still picture to be displayed for an extended period, as this can
	cause a permanent after-image to remain on the Plasma Display.
	Examples of still pictures include logos, video games, computer images, teletext
	and images displayed in 4:3 mode.
	Note:
After-images appear	The permanent after-image on the Plasma Display resulting from fixed image use
	is not an operating defect and as such is not covered by the Warranty.
	This product is not designed to display fixed images for extended periods of time.
Whirring sounds can be heard	The display unit is fitted with a cooling fan to dissipate heat generated during normal use.
from the display unit.	The whirring sound is caused by rotation of the fan and is not a malfunction.

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