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Apple Cinema display 23" ... detection problem

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    #21
    Re: Apple Cinema display 23" ... detection problem

    maybe it's related to pins not used in that monitor.

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      #22
      Re: Apple Cinema display 23" ... detection problem

      Originally posted by stj View Post
      maybe it's related to pins not used in that monitor.
      ah, ok, that can be the case.

      I've ordered some of those IC's so I'm going to replace it anyway... maybe it has a function so the chip has to be present.

      I know of a few other identical display's which has problems with the Tcon board... I wonder if this short to ground is a regular fault with these screens.

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        #23
        Re: Apple Cinema display 23" ... detection problem

        Who makes the LCD panel? LG?
        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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          #24
          Re: Apple Cinema display 23" ... detection problem

          Yes, I believe it's an LG.Philips LM230W02 IPS panel.
          It sure has a very nice and bright picture with very natural colors.

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            #25
            Re: Apple Cinema display 23" ... detection problem

            i thought stuff begining "LM" was mostly from Sharp?

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              #26
              Re: Apple Cinema display 23" ... detection problem

              Spec:
              Attached Files
              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


                #27
                Re: Apple Cinema display 23" ... detection problem

                LM230WU3-STC1 in my case
                Attached Files

                Comment


                  #28
                  Re: Apple Cinema display 23" ... detection problem

                  Hey Porto, we're probably not talking Schmitt trigger but EEPROM here. I wonder if it's U8 you've removed. I believe U8 is an EEPROM responsible for communicating EDID info to your computer with the monitor still switched off, and PSU checked out as functional.
                  Once the monitor is properly switched on, I think U1 will take over EDID info over 2 wire serial com (SDA +SCL)
                  Hee man, ik spreek ook Nederlands!

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                    #29
                    Re: Apple Cinema display 23" ... detection problem

                    hej hej.

                    but most people dont speak "viking", so best to use english here.

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                      #30
                      Re: Apple Cinema display 23" ... detection problem

                      Nej snakke Norsk, Svenska, Dansk, but I've got the drift... Sorry. English my pleasure.
                      Although "Nederlands" is not to be counted amongst the "Northern Germanic" aka "Viking" (no offence intended) languages Philips I2C is included in the DVI protocol as a "2 Wire Protocol", carrying SDA (DDC Data) and SCL (DDC Clock).
                      Best read my post #27 here on the subject.

                      Comment


                        #31
                        Re: Apple Cinema display 23" ... detection problem

                        Originally posted by hexdiy View Post
                        Hey Porto, we're probably not talking Schmitt trigger but EEPROM here. I wonder if it's U8 you've removed. I believe U8 is an EEPROM responsible for communicating EDID info to your computer with the monitor still switched off, and PSU checked out as functional.
                        Once the monitor is properly switched on, I think U1 will take over EDID info over 2 wire serial com (SDA +SCL)
                        Hee man, ik spreek ook Nederlands!
                        Hoi!

                        Nope, I removed UD1 on the Tcon board, it was shorted to ground.
                        I don't think it's an EEPROM, but why it's there, beats me!

                        Helaas mogen we hier geen Nederlands praten, vindt Budm niet leuk!
                        (Unfortunately we are not allow to speak Dutch in here, Budm won't be happy about it! )

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