Panasonic GX740Z Ehelp page 313

White spots or shadow images (noise)
Check the position, direction and connection of the aerial.
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There may be a short black image
A black image is displayed to avoid picture distortion when an input signal
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changes.
There may be white spots, red spots, blue spots, green spots and black spots
on the screen
An image on a TV screen is created by many small groups of dots known
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as pixels (which is similar to the image in a newspaper). It also naturally
follows that higher panel resolutions contain more pixels. To create a
colour image, each pixel consists of three tiny coloured dots (known as
sub-pixels), one each of red, green and blue. Each one of these dots is
precisely controlled by the electronics of the TV to produce the picture.
Whilst Panasonic maintains the highest standards in manufacturing
technology and processes in the construction of these panels, there are a
number of allowable pixel / subpixel failures that still allow the panel to be
defined as a good panel. It is not possible to guarantee absolutely no pixel
loss.
Shop appears on screen at switch on
Shop was selected in first time Auto Tuning when the TV is turned on for
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the first time. Reset settings in
first time Auto Tuning.
Functions > Shipping Condition > Shipping Condition
Only for the OLED TV
A white horizontal line appears in Standby mode
A white horizontal line may appear on the screen for a while to adjust the
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panel. This is not a malfunction.
Shipping Condition, then select
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