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Sony TV problem.

This TV has normal sound. channels are changed by remote control or micro switch. but no picture. the screen looks like a rainbow.(colour patches) CRT plug changed but fault was not corrected.
Fly Back transformer changed . no results.
can you help me to correct this fault.

Posted by on

  • Hapana Mar 07, 2008

    fault was not corrected yet.
    TDA8375A IC was replaced.
    FLY was replaced.
    There is no OSD.No Pictures on the screen.
    Screen looks like a rainbow.
    Screen control adjusted. but no results.

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2 Answers

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Follow this procedure to troubleshoot a NO SIGNAL error on the TV screen.

  1. Tune the television to a different channel or input.
  2. NOTES:
    • If the television is displaying the error message on only a few channels or inputs, the issue is being generated by the signal source or a connected external component.
    • Televisions with digital tuners require a signal strength of at least 25% before a digital broadcast will be displayed on the screen.
    • It may be necessary to press the TV, ANT, or AUX button on the remote control to change input back to the television tuner.
  3. Attempt to play a different video source, such as a VCR, through the television tuner.
  4. NOTE: If the error message is not visible when viewing this second video source, the issue is isolated to the signal source being received and no further troubleshooting is necessary.
  5. Turn off the television.
  6. Unplug the television from the AC wall outlet for 60 seconds.
  7. Plug the power cord back into the AC wall outlet.
  8. Turn on the television.
  9. Auto Program the television tuner.
  10. Replace the coaxial cable connecting the video component to the television.

Posted on Mar 06, 2008

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Chances are the CRT has expired. In that case I would recommend replacing the entire unit.

Posted on Mar 06, 2008

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