Question about Sony KP-57HW40 57" Rear Projection Television

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Main screen showing "no signal"

I have the sony KP-43HT20 pojection tv. Have been using split-screen since it was purchased about 4 yrs. ago. I am on cable, had an interruption in service last week, now my main screen shows "no signal", but the secondary screen still working. Had Queek Squad come out, they couldn't figure it out. Also had another person from cable company out, no one seems to have any idea what is wrong, cable signal has been checked. Tried everything. Please help if you can.

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  • petejr Feb 21, 2009

    VERY helpful. Thank you so much.

  • RodolfoG Mar 05, 2009

    My rear projection TV SONY KP-57HW40 have the same problem: there is a black screen and "no signal" message when using ANTENA input (cable service), but when I use the twin screen function (to see two programs at the same time), there is video and audio in the second tuner. All video inputs works OK. Do somebody here know how to solve this issue? Thanks in advance. gilrodolfo@hotmail.com

  • RodolfoG May 11, 2010

    Hi welcomejee. Could you provide you more technical info?. Thanks

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KP-43HT20 has 2 tuners, one is main (TU2) and 2nd is called sub tuner (TU1). Both tuners are mounted on A board located on right side of TV.
In my opinion, main tuner (TU2) is not working and causing No Signal message.
Let me know if you want to repair tv by yourself.to provide you more technical info.

Posted on Feb 21, 2009

  • jeffreybch
    jeffreybch Nov 06, 2012

    Could you please tell me how to do it myself? Kind Regards Jeffreybch@gmail.com

  • jeffreybch
    jeffreybch Nov 06, 2012

    Could you please tell me how to repair it myself? Kind Regards, Jeffreybch@gmail.com

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