We have a Phillips plasma tv and the picture pixelates randomly and freezes for about a second and sound breaks also. We have had everything checked and have been unable to find a solution. The latest internet research has led us to think it may be the coax. Can you help?

SERVICE MENU SETTINGS
All system, geometry and white balance alignments are performed in production service mode. Before
starting the production mode alignments, make sure that all manual adjustments are done correctly. To
start production mode alignments enter the MENU by pressing “M” button and then press the digits 4, 7,
2 and 5 respectively. The following menu appears on the screen
There are 3 submenu in service menu. These are display, calibration and deinterlacer menus. Press
“◄/►” buttons to select a menu title and then “▲/▼” buttons to select a menu item and “◄/►” or “OK”
buttons to set the menu item to the desired option. To exit the service menu press “M” button.
Entire service menu parameters of Plasma TV are listed below.
13.1. display menu
By pressing “◄/►” buttons select the first icon. display menu appears on the screen
blank color
By pressing /. button, select blank color. Press ./. button to set the blank color. The options are:
black, red, green and blue.
panel
Displays panel resolution
power on time
Displays total working time of the set
backlight on time
Displays total backlight on time of the set.
calibration menu
By pressing “◄/►” buttons select the second icon. calibration menu appears on the screen.
color temp
By pressing /. button, select color temp. Press ./. button to set the color temperature. The
options are: 5500K, 6500K, 7500K, 9300K and user.
user color temp
factory reset
By pressing /. button, select factory reset. Press “OK” button to return to the factory setting values.

A weak signal can also cause this problem. Better have a tech to figure out or try another antenna installation.

Hello,
Try to hard reset the tv..Leave it unplugged for 4-6 hours and then plug it again and use..If this did not help Try to contact a service centre or service person because this is probably a hardware problem which definetly needs service and replacement!!...Thank you..

Hope this helps you....

Kind Regards!!

In my openion, Its problem of hardware in your TV and signal processing circuits are involved. It might be problem of Firmware (programe to control the performence over all) Philips can advise you better in this regard.