Magnavox 32md359b/f7 White Screen and with sound only

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  • YEROC37
    Senior Member
    • Sep 2012
    • 119
    • USA

    #181
    Re: Magnavox 32md359b/f7 White Screen and with sound only

    I don't see the VDDG at all,

    Comment

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #182
      Re: Magnavox 32md359b/f7 White Screen and with sound only

      Sorry my fault, I wasn't thinking when I said something like VDDG, just added a random letter.
      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

      Comment

      • YEROC37
        Senior Member
        • Sep 2012
        • 119
        • USA

        #183
        Re: Magnavox 32md359b/f7 White Screen and with sound only

        Anything is ok at this point, so Is this french toast or maybe something else we can try?

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #184
          Re: Magnavox 32md359b/f7 White Screen and with sound only

          Each of the flexes has an IC chip attached to it bonded in the flex. If the chip goes wrong, you get a bar on the screen. Usually not all the chips go wrong at once so it can point to a more common fault - such as a processing board fault (HDMI board in this instance.) Thing is, the power supply in these things are so unstable (self-oscillating, without any form of intelligent IC to control it), it's possible they passed a surge or similar through to all the drivers and toasted them simultaneously. Apparently someone had a similar problem with an LG plasma (which also uses chip on flex... half of his screen got fried due to a common fault - I wouldn't be surprised if all could be damaged at once.) I'm not sure where to go from here, there are no fuses on the board to test, all the voltages appear to be there, it's just not working.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

          • YEROC37
            Senior Member
            • Sep 2012
            • 119
            • USA

            #185
            Re: Magnavox 32md359b/f7 White Screen and with sound only

            the fact that I play with the cables and putting them in or at right now as a last minute thing to do wouldn't make any difference....I see screen get dark, boxes appear, lines, etc... LOL..I know I'm fetching but I know I could possibly use this thing for parts..caps, etc...

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #186
              Re: Magnavox 32md359b/f7 White Screen and with sound only

              If you are seeing something briefly when you play with the cables have you tried the trick in this video?
              http://www.youtube.com/watch?v=vCExlSnG4yY
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

              Comment

              • YEROC37
                Senior Member
                • Sep 2012
                • 119
                • USA

                #187
                Re: Magnavox 32md359b/f7 White Screen and with sound only

                Well, taken everything off TV, boards, DVD drive, etc... Maybe they can become parts for something or I can make something interesting later for grandkids lol

                Comment

                • YEROC37
                  Senior Member
                  • Sep 2012
                  • 119
                  • USA

                  #188
                  Re: Magnavox 32md359b/f7 White Screen and with sound only

                  More than likely the inverter board is still good correct?

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK

                    #189
                    Re: Magnavox 32md359b/f7 White Screen and with sound only

                    Yes, and the PSU is probably good. The HDMI board would be the only questionable board in my opinion.
                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                    Comment

                    • YEROC37
                      Senior Member
                      • Sep 2012
                      • 119
                      • USA

                      #190
                      Re: Magnavox 32md359b/f7 White Screen and with sound only

                      HDMI eh? I had TV out by the front lawn and just went and grabbed it lol...I can put everything back together again, but how likely is it

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #191
                        Re: Magnavox 32md359b/f7 White Screen and with sound only

                        Thing is the only fault with that would be very difficult to trace without an oscilloscope. You could replace the board but I'd expect it's fairly pricey.

                        But you'll soon be checking Craigslist or similar sites for faulty TVs... once you get bitten there's no going back! Try and pick up a 32" Samsung of the R87 series - they have common issues with bad caps and are generally nice easy fixes.
                        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                        Comment

                        • YEROC37
                          Senior Member
                          • Sep 2012
                          • 119
                          • USA

                          #192
                          Re: Magnavox 32md359b/f7 White Screen and with sound only

                          Ok cool, I seen a hdmi board for 17.50 on ebay, seller has excellent rating and policy

                          Comment

                          • tom66
                            EVs Rule
                            • Apr 2011
                            • 32560
                            • UK

                            #193
                            Re: Magnavox 32md359b/f7 White Screen and with sound only

                            Well if you feel like taking a chance go for it. It could be your problem and it would be a nice easy fix.
                            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                            Comment

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