Flatron l246wp-bn White Screen

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Dragunbayne
    Member
    • May 2012
    • 12
    • United States

    #1

    Flatron l246wp-bn White Screen

    The screen turns on and is bright white. I have checked for bad caps, checked the fuse on the T-con board and checked the power going into the T-con board. From the spec sheet I found it says the four vdd pins for the T-con should be 5 volts, they are less than 4. Could this be the cause of my problem? All help is greatly appreciated.
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Flatron l246wp-bn White Screen

    Is your 5V power supply on the power supply board also showing 4VDC?
    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

    • Dragunbayne
      Member
      • May 2012
      • 12
      • United States

      #3
      Re: Flatron l246wp-bn White Screen

      The 5V off the power supply does read 5V, but oddly the 12V reads 14.4V.

      Edit: I wanted to test the voltage on the T-Con again for good measure and realized the markings on the board don't actually correspond to the connector. So I tested with the proper pins and the voltage read 4.85, so I guess that's not the issue.
      Last edited by Dragunbayne; 10-14-2013, 07:48 AM.

      Comment

      • momaka
        master hoarder
        • May 2008
        • 12170
        • Bulgaria

        #4
        Re: Flatron l246wp-bn White Screen

        Post pictures of the t-con board. In particular, there should be a round inductor inductor somewhere on the t-con. It's usually somewhat near the t-con connector. This is the main area of interest, so take more pictures of that area and post them here.

        Also, see if any component on the t-con gets hot when you try to power on the monitor.

        Comment

        • Dragunbayne
          Member
          • May 2012
          • 12
          • United States

          #5
          Re: Flatron l246wp-bn White Screen

          Pictures of the T-Con.







          EDIT: Added better full shot.
          Last edited by Dragunbayne; 10-21-2013, 04:53 PM.

          Comment

          • kc8adu
            Super Moderator
            • Nov 2003
            • 8832
            • U.S.A!

            #6
            Re: Flatron l246wp-bn White Screen

            is that an as15 chip i see?
            its the one with leads on all 4 sides.
            high failure rate part and can do just what you are seeing.

            Comment

            • Dragunbayne
              Member
              • May 2012
              • 12
              • United States

              #7
              Re: Flatron l246wp-bn White Screen

              The chip is not labelled. The board model is M240UW01 if that helps.

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #8
                Re: Flatron l246wp-bn White Screen

                It is AUOPTO board/screen which uses AS15 IC for Gamma voltage ref. Please look at the P/N of that IC.
                Attached Files
                Last edited by budm; 10-21-2013, 08:39 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

                • Dragunbayne
                  Member
                  • May 2012
                  • 12
                  • United States

                  #9
                  Re: Flatron l246wp-bn White Screen

                  Sorry, I don't see any labeling on the chip. Here is a close up:

                  Comment

                  • Dragunbayne
                    Member
                    • May 2012
                    • 12
                    • United States

                    #10
                    Re: Flatron l246wp-bn White Screen

                    HA! I just zoomed in on the picture and I can see it is an AS15. It's very difficult to see the writing on the chip physically but it can be seen pretty clearly in the picture. Is this likely the issue then?

                    Comment

                    Related Topics

                    Collapse

                    • Daren87
                      Sony 8K XBR-75Z8H White Screen Vertical Bars Tcon Code. Help NeededπŸ™
                      by Daren87
                      Hello everyone,

                      I've recently been given a Sony 8k Z8H. It's got a white screen with two vertical black bars. At times it's given me the 5 blink Tcon code. Testing voltage on the Tcon I can see some low or missing voltage. I've done a basic visual check of cables and the COF. Not seeing anything obvious. The original Tcon seemed to have good caps until turning it over. On the bottom I found maybe 10 caps with both sides of the caps shorting to ground. I thought ok these caps and likely other components on the Tcon are shorted so let's try a replacement Tcon. I just received the...
                      08-13-2023, 03:25 PM
                    • harp
                      White screen repairs
                      by harp
                      To ask here... I have few devices with white screen problem, actualy nokia 2220 and some fuji? camera, and try to understand what is common problem to cause that issue.
                      Yes, both devices work everything else probably ok, I mean, I hear intro melody and keypress click sound, DTMF tone, power on off... all ok.
                      On desk is nokia 2220 slide, and I check all screen connectors and components arround it, measure voltage drop, but all looks ok. I suspect on slide flex cable, but it look ok and white screen is not interupt while flexing board, pushing conectors, and sliding up down. In attachment...
                      05-13-2024, 03:43 AM
                    • Ryan.man
                      Macbook 2017 with touchbar (A1706) won't turn on after removing the screen
                      by Ryan.man
                      Hello everybody! Posting this in hopes somebody has some expertise that leads to a clear path of troubleshooting that saves me a lot of time!

                      My macbook has the flex cable problem, the one that prevents the screen turning on. Ive been dealing with this for the last 3 years. Last year it went dead and I managed to fix it following youtube tutorials. But my fix wasnt the best, the problem returned a month later. This week, it went dead again. I again tried to fix it.

                      This time the original cable broke too close to the screen, it can't be fixed without tearing the screen...
                      02-04-2025, 12:23 PM
                    • x_orange90_x
                      TCL 50S535 bad tcon or panel issue?
                      by x_orange90_x
                      Just bought this for 10 bucks yesterday hoping to fix it. The guy said water dropped inside from a dehumidifier hose and it started showing black and white vertical bars then went blank. When I got it home and turned it on it came on fine and displayed correctly but I was noticing faint vertical bars in the image. After a little bit I turned it off and back on and it was a black screen again. I opened it up to check for water damage and corrosion but didn't find anything of the sort. I cleaned the ribbons anyway and reconnected them but still got a blank screen. If I disconnect the right side...
                      03-29-2025, 11:02 PM
                    • alltvrepairs
                      Lg TCon test pins for screen test
                      by alltvrepairs
                      Hi,
                      i have a 65 Panasonic TX-65HX710E using vestel 17MB170 main and Lg tcon.

                      Few drops of water fell probably near COF and have no display. Tried removing tabs but no.part of display present as if tcon fuse open. However 12v is present and tcon can be felt warm enough that supplies are present. Backlight and sound ok.

                      Anyone knows if this TCon 6870c-0805A has any special test pins for rgb test?

                      Appreciate your help....
                      06-13-2025, 06:33 AM
                    • Loading...
                    • No more items.
                    Working...