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Grundig Vision 7 37-7851T hard to turn on

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    #1

    Grundig Vision 7 37-7851T hard to turn on

    So i have this tv for like 7 years no issues and like a month or two my tv started having issues when turning on the light blinks like its going to turn on and then the light lights up bright as the tv wasn't even turned on and no picture on the tv. So you have to turn on the tv for like 10-15 times in order for it to turn on and when it turns on (on hdmi input) when i turn on my satellite it turns off for some reason but if i leave it running on the blue screen while my satelitte is off for a half an hour you can watch the satelitte with no issues... I already replaced 1 capacitor when the tv wasn't turning on at all and now this is happening to me for some weird reason i inspected the mb while i was replacing that cap and i found nothing..

    Help?
    Tags: None
    #2
    Re: Grundig Vision 7 37-7851T hard to turn on

    It would appear you have some more e-caps that have changed value on the Main Bd. and probably too on the PSU. I would suggest measuring the ESR and Capacitance on all e-caps and change them out.

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      #3
      Re: Grundig Vision 7 37-7851T hard to turn on

      They didn't look blown out or puffed so i didn't noticed any... If i measure the capacitance with a multimeter will it measure right if the cap is soldered on the board? I mean will it give the correct value?

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        #4
        Re: Grundig Vision 7 37-7851T hard to turn on

        Bad cap can look normal, you will also need cap meter that can also read ESR not just the capacitance.
        The replacement is low ESR type that you use?
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

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          #5
          Re: Grundig Vision 7 37-7851T hard to turn on

          I got the replacement cap from an old power supply for a pc as i didn't have any others on my hand i guess it was bad but it worked for some time..

          Any cheap ESR meters that you would recommend?

          Comment

            #6
            Re: Grundig Vision 7 37-7851T hard to turn on

            I just noticed this as the tv was previosly repaired by some guy.

            Originally there was 2x 680uF 35V but now there is 4x 470uF 35V.. Could this be the issue?
            Attached Files

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              #7
              Re: Grundig Vision 7 37-7851T hard to turn on

              you have tu take new parts 105grd types!They are not expensive!!!!
              Take a hairdryer and blow into the power supply
              Then turn on the LCD TV if start immediately the e caps are finished

              http://forum.iwenzo.de/grundig-servi...e--t61847.html

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