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I own a 3 year old Panasonic TH-50px77u. The picture has changed and no longer shows and red color in the picture. This seemed to change when I plugged in an XBOX video game 3 night s ago.

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  • Paul Bade Jan 02, 2011

    Are you saying you have no red (picture is only blue, green or cyan) on any input, or is this the case just for the X-Box input? What input is the X-Box using?

  • timothycl804 Jan 02, 2011

    I own a 3 year old Panasonic TH-50px77u. The picture has changed and no longer shows any red color in the picture. This problem first occured when I plugged in an XBOX for the first time....now no red color on my screen..please help

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If I understand this correctly, since you connected one of the HDMI inputs to an X-box, you do not see any red in any picture from any source, not even the SD Photo display input. White areas in the picture are cyan colored; other areas are various shades of blue-green. Red areas are black. This is the worst case; it is not clear from your description whether this is what you see or if the red areas are just not red enough.

Try going to the Picture menu and changing Picture Mode to "Normal", and Normal to "set". Turn Color mgmt. off. Refer to pages 26-27 of your owner's manual (download here). If this doesn't help, try selecting different Color temp settings. Make a note of which combinations of settings are giving you good results and which are giving you poor results.

If you cannot get close to factory default color, download the service manual and post back so we can take a look at the numbers in the video processor's EEPROM (data memory). We can continue diagnostics from that point if necessary. You may want to compare the EEPROM numbers for the settings that give bad results with the nominal values given in the service manual - if one of the numbers for red is way off, that could be the problem. Please post back before trying to change any numbers in the EEPROM - we don't want to make a bigger mess, and it would be a good idea to figure out what is going on first.

Posted on Jan 03, 2011

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