Question about Panasonic PT-51HX40 51" Rear Projection Television

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Just appeared on the screen

The following appeared on my screen (upper right) last night: "CHK" followed by a long string of alpha and numeric digits.  Someone told me the TV is probably in its diagnostic mode.  How do i get it out of the diagnostic mode?

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  • Tony Martin Nov 22, 2007

    Panasonic e-mailed me back with the following solution. It works to remove the code from the screen, but not to fix the underlying problem. Make sure you press the buttons on the TV itself, not on the remote.

    1. Television power should be on.

    2. Hold [ACTION] & [POWER] ON THE TELEVISION for more than five seconds. 3."SELF-CHECK" will display.

  • Anonymous Nov 22, 2007

    A gentlement to me the same and I applied it. about 5mins. the code came back. I'm not a technician. I will more solutions.



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The following appears on the screen CHKOF1EE OOOOOOOO
sometime it comes as CHKOAB 48884848 and so fort.
what can I do to remove it?

PT-51HX4OB 51in

Posted on Nov 21, 2007


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Posted on Jan 02, 2017


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Nov 18, 2007 | Panasonic PT-51HX40 51" Rear Projection...

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