Question about Mitsubishi VS-55707 TV

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Screen Jumpy on various Inputs

All inputs but the main cable input are jumpy. Sound is fine but video bounces really bad.

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  • 42 Answers

This unit had a very bad problem with the pip bord

Several caps have to be replaced on the board

I would have a tv repair shop do it for you

You have to remove surface mount caps and replace them which is hard to do


Posted on Feb 10, 2009

  • tom woodward
    tom woodward Feb 10, 2009

    This unit had a very bad problem with the pip bord

    Several caps have to be replaced on the board

    I would have a tv repair shop do it for you

    You have to remove surface mount caps and replace them which is hard to do



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I have a Toshiba cx35e70 tv. The problem began as a turn on, live screen, no channels, no sound. I found that when I would tap on the tuner on the main board the problem would disappear. Every thing worked...


Is the VCR going through ch 3 or video inputs - if video inputs your TV tuner is likely bad if through ch 3 seeif te picture goes funny on ch 3 without using the VCR the tuner may be bad on higher band channels - smetimes you can remove the tuner and resolder the tuner itself. But if it always works with the VCR just use it that way and don't bother with the fix.

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If you can see the menus this means the CRT, high voltage, scan amplifiiers, the output video processor, and CRT drive circuits are working. The fault is most likely in the video section of the input select circuits.

Maybe the Toshiba parts department can supply a service manual for your set. With a signal source, a scope, and a DVM, an experienced technician can troubleshoot your set to locate where the failure is occuring.

I have not serviced this model, but in other models I have found the main input select IC to be defective. In some cases I also found a bad voltage regulator IC that supplies the input section has failed.

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And on your PS3--goto the settings menu, sound outputs, make sure you select A/V connector and analog sound. The ps3 cable can become sloppy too, wiggle/check/reseat or try another cabe (usually video is touchy more than the sound though)

If you KNOW you've got the right input selected and the PS3 is setup properly, do you have another device with audio output to test on the TV? a notebook computer, walkman, cd player--anything that has rca outputs for sound--quick swap the cables to the new 'test' device-- if sound is OK with test device, either PS3 setting or cable is bad/wrong. if no sound from test device on TV either the tv is not using proper inputs, or is damaged, or the test device is not properly configured. If you have another input receiving device to test the ps3 output sound, like the LINE INPUT on a notebook computer, or a boombox with Aux inputs, test the PS3 sound output too.

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1 Answer

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If this set uses a picture tube then your problem may be in the vertical deflection circuit. Also an unstable power supply will cause this problem. Stargazer

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