Panasonic TH-55AS740A, Manual

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White spots or shadow images (noise)
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Check the position, direction, and connection of the aerial.
There may be red spots, blue spots, green spots and black spots on the
screen
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An image on a TV screen is created by many small groups of dots known
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
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Shop was selected in first time Auto Tuning when the TV is turned on for
the first time. Reset settings in Shipping Condition , then select Home in
first time Auto Tuning.
Functions > Shipping Condition > Shipping Condition
Digital TV
Before requesting service or assistance, please follow these simple guides to
solve the problem.
If the problem still persists, please contact your local Panasonic dealer for
assistance.
Connecting devices such as DTV recorder / PVR / VCR, etc. that also require
an antenna connection to the digital television
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To maintain optimum antenna signal quality, use an ‘F’ type TV signal
splitter when connecting two or more devices to the same antenna socket.
Hint: Some degradation of the DTV signal may occur if you are connecting
the aerial through an external device (e.g. DVD Recorder or Set Top Box).
In this case it is better to use a splitter and connect the aerial directly to both
devices.