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Vizio D48-D0 10241020222, backlight ON, no picture, new boards

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    #1

    Vizio D48-D0 10241020222, backlight ON, no picture, new boards

    Hello all,

    Have a Vizio D48-D0, 10241020222. S/N starts with LAUSTWBS.

    The TV powers on, backlights present, no picture (not sure if this TV makes a sound on power up, but no sound heard). No special blinking LED code on front panel. At power up, the backlights look bright, then for about a second, the backlights go out, then they come back on, but look a bit dimmer than they did at power up (no picture throughout that process).

    The power board is a 0500-0605-0940. The main board is a 3648-0202-0395. ShopJimmy sold both boards for $50 total, so I ordered SJ-KIT-D48-D0-K1. Received the boards, listing said compatible with S/N LAUSTWBS, but the main board bar code had a slight difference. The original main board was 3648-0202-0150(3B), but the board from ShopJimmy is a 3648-0202-0150(3D). May that be the problem?

    I removed the old boards and put in the new kit from SJ. Here are the pin readings:

    NEW MAIN BOARD AND NEW POWER BOARD:
    CN301: LED1+: Pin 1: 63.7VDC
    CN301: LED1-: Pin 2: 1.8VDC
    CN301: LED2+: Pin 3: 63.7VDC
    CN301: LED2-: Pin 4: 1.8VDC
    CN301: LED3+: Pin 5: 63.7VDC
    CN301: LED3-: Pin 6: 1.8VDC
    CN301: LED4+: Pin 7: 63.7VDC
    CN301: LED4-: Pin 8: 1.8VDC
    CN301: LED5+: Pin 9: 63.7VDC
    CN301: LED5-: Pin 10: 1.8VDC

    CN201: PWM5: Pin 14: 3.3VDC
    CN201: PWM4: Pin 13: 3.3VDC
    CN201: PWM3: Pin 12: 3.3VDC
    CN201: PWM2: Pin 11: 3.3VDC
    CN201: PWM1: Pin 10: 3.3VDC
    CN201: Boost LED current: Pin 09: 0
    CN201: Backlight: Pin 08: 3.3VDC
    CN201: PS-ON: Pin 07: 3.3VDC
    CN201: GND: Pin 06: 0
    CN201: GND: Pin 05: 0
    CN201: GND: Pin 04: 0
    CN201: +18Vsb: Pin 03: 18VDC
    CN201: +18Vsb: Pin 02: 18VDC
    CN201: +18Vsb: Pin 01: 18VDC

    Here are the readings from the old boards:

    OLD MAIN BOARD AND OLD POWER BOARD:
    CN301: LED1+: Pin 1: 64VDC
    CN301: LED1-: Pin 2: 10VDC
    CN301: LED2+: Pin 3: 64VDC
    CN301: LED2-: Pin 4: 10VDC
    CN301: LED3+: Pin 5: 64VDC
    CN301: LED3-: Pin 6: 10VDC
    CN301: LED4+: Pin 7: 64VDC
    CN301: LED4-: Pin 8: 10VDC
    CN301: LED5+: Pin 9: 64VDC
    CN301: LED5-: Pin 10: 10VDC

    CN201: PWM5: Pin 14: 1.6VDC
    CN201: PWM4: Pin 13: 1.6VDC
    CN201: PWM3: Pin 12: 1.6VDC
    CN201: PWM2: Pin 11: 1.6VDC
    CN201: PWM1: Pin 10: 1.6VDC
    CN201: Boost LED current: Pin 09: 11mV
    CN201: Backlight: Pin 08: 3.3VDC
    CN201: PS-ON: Pin 07: 3.3VDC
    CN201: GND: Pin 06: 0
    CN201: GND: Pin 05: 0
    CN201: GND: Pin 04: 0
    CN201: +18Vsb: Pin 03: 18VDC
    CN201: +18Vsb: Pin 02: 18VDC
    CN201: +18Vsb: Pin 01: 18VDC

    LED issue? Part discrepancy between the (3B) and (3D)? My headache meter is pegged. I can't remember SJ ever sending me a bad/incompatible part.

    Any suggestions would be greatly appreciated!
    Attached Files
    Tags: None
    #2
    Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

    T-con? What was your original problem?
    I assume no responsibility for any stupid suggestions I might post.

    Comment

      #3
      Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

      Originally posted by dskall View Post
      T-con? What was your original problem?
      I thought t-con too, however, there is no t-con (unless it's hidden really well). Original problem is same as current problem.

      Comment

        #4
        Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

        Originally posted by joeblah View Post
        I thought t-con too, however, there is no t-con (unless it's hidden really well). Original problem is same as current problem.
        The part number stops before the parenthesis, anything after that is factory info and not relevant. The 12 digit part number (3648-0202-0150) is the same on both boards so it's the same part.

        So you have the same issue now as you did originally, no video WITH backlight on, it's highly likely that the display panel is bad since this model has no T-CON, and you've already swapped out the main board. The LED strips are working since they are on as you stated earlier. There's a small chance the main board we sent is defective, I'd say 10% or less.

        Keith M.
        (Technician at ShopJimmy)
        Last edited by xeroextre; 02-16-2017, 09:19 AM.

        Comment

          #5
          Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

          The panel has integrated T-CON so there should be a SMD fuse the long board of the panel that you need to find out if it is getting the switched 12v to both ends of the fuse or not.
          BTW, what is the LCD panel model number?
          Last edited by budm; 02-16-2017, 10:30 AM.
          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

          Comment

            #6
            Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

            Originally posted by xeroextre View Post
            The part number stops before the parenthesis, anything after that is factory info and not relevant. The 12 digit part number (3648-0202-0150) is the same on both boards so it's the same part.

            So you have the same issue now as you did originally, no video WITH backlight on, it's highly likely that the display panel is bad since this model has no T-CON, and you've already swapped out the main board. The LED strips are working since they are on as you stated earlier. There's a small chance the main board we sent is defective, I'd say 10% or less.

            Keith M.
            (Technician at ShopJimmy)
            Ah, okay, thanks Keith.

            Comment

              #7
              Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

              Originally posted by budm View Post
              The panel has integrated T-CON so there should be a SMD fuse the long board of the panel that you need to find out if it is getting the switched 12v to both ends of the fuse or not.
              BTW, what is the LCD panel model number?
              Thanks, bud. I have 12.5VDC on both sides of the SMD fuse you mentioned. Not sure about the LCD panel number. Attached are some pictures, but I Google'd all the numbers and didn't find anything helpful.

              15Y_R48FF11MB7S4LV0.2
              U33341E5K16ML
              LSC480HN08
              CS160109D
              1813-0302-2011
              1713-0302-2010
              MV-0SE88441
              D99S3
              Attached Files

              Comment

                #8
                Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                There are various test points on the board.

                Avdd_17v (obviously should be 17v)
                3.3v ( same as above.

                Then look for other points like sda, vgl, vone, voffe.

                post results of all the test points you can see.

                Comment

                  #9
                  Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                  PS, either I'm blind or just completely looking at this the wrong way.... But where are the COF that connect to the panel?

                  Comment

                    #10
                    Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                    Originally posted by Hamie View Post
                    There are various test points on the board.

                    Avdd_17v (obviously should be 17v)
                    3.3v ( same as above.

                    Then look for other points like sda, vgl, vone, voffe.

                    post results of all the test points you can see.
                    Hey Hamie, thanks for the info. Here are some better pictures and measurements:

                    AVDD_17V: 172mV
                    VCC: 3.3V
                    VOFF_-11V: 110mV
                    ATD_MON_T: 1.7V
                    ATD_MON_D: 13mV
                    VCC_1.8: 1.8V
                    WP: 3.3V
                    SCL: 3.3V
                    SDA: 3.3V
                    MON_L: 334mV
                    MON_R: 334mV

                    All of the other test points ranged from 10mV-340mV.
                    Attached Files

                    Comment

                      #11
                      Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                      OK so you have a problem somewhere.
                      I'd check all the smd caps and see if any are shorted.

                      Comment

                        #12
                        Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                        Originally posted by Hamie View Post
                        OK so you have a problem somewhere.
                        I'd check all the smd caps and see if any are shorted.
                        Hamie, most of the SMD caps on that particular board are open, a few in close proximity to each other measure ~1kΩ. That was done in-circuit, though.

                        Comment

                          #13
                          Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                          https://www.badcaps.net/forum/attach...9&d=1487372049
                          See those two ICs with two small inductors with '100', '220' on tops?
                          Those IC are part of switching power supplies that generate VGH, VGL, etc.
                          Get the P/N and look up the spec sheets so you can see if they are generating the Voltages or not.
                          Example:
                          http://tvrepairsolution.blogspot.com...lcd-panel.html
                          Last edited by budm; 02-17-2017, 09:16 PM.
                          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

                          Comment

                            #14
                            Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                            Hello,

                            I'm having a similar issue with this board. I just replaced the main board on a Vizio D48N-80 which restored functionality to the TV. The output is distorted though. The same board discussed here is used in this TV. I found that one of the small inductors labeled 220 is shorted to ground on the board that has been discussed on here. I can't find a replacement board so I need to attempt a component level repair.

                            Thank you

                            Comment

                              #15
                              Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                              Tried to find a proper place to post this question but could not - I have a Vizio D48-D0 with no power. Replaced the power supply board, nada. Looking to replace the main board - cheap enuff on ebay. Anyone know if you can sub a 3648-0202-0150(3E) for a 3648-0202-0150(3B)?

                              Comment

                                #16
                                Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                                .
                                Last edited by nomoresonys; 12-16-2018, 06:03 AM.

                                Comment

                                  #17
                                  Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                                  See if thats a match, on left in red it says works with starting serial nos. your number is there, you can call them to verify. https://www.shopjimmy.com/vizio-3648...0-laustwbr.htm

                                  Comment

                                    #18
                                    Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                                    Both boards there for 50 bucks. https://www.shopjimmy.com/vizio-d48-...-version-1.htm

                                    Comment

                                      #19
                                      Re: Vizio D48-D0 10241020222, backlight ON, no picture, new boards

                                      Plenty there from 13.50 on up. https://www.ebay.com/sch/i.html?_fro...acat=0&_sop=15
                                      Last edited by nomoresonys; 12-16-2018, 06:36 AM.

                                      Comment

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