Very Very weird Help please if u can

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  • LITEZONER
    GO BOLTS!
    • Mar 2010
    • 223
    • USA

    #1

    Very Very weird Help please if u can

    I have an ACER AL2032w monitor, shut it down for the weekend, came in Monday, it won't go out of standby (Orange Light) figured bad caps, replaced with Panasonic caps of exact same specs, temp, everything. The old one's were bulging just a bit. still same issue, but here is the weird part, I power on the monitor, orange light still, no logo, nothing, plug in a VGA cable from pc to input on monitor with power on, Monitor Power goes off. unplug vga cable, (signal) monitor comes back on (Orange light) I am thinking power supply, I have no clue how to connect up a voltage drop test on it to see if the signal is just too much for the power supply to handle because it's failing??? what do you think folks?. Thank you in advance for all your ideas and suggestions, all are very much appreciated.
    39 Soldering Iron burns And Counting
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Very Very weird Help please if u can

    Not sure if this model the Led will go from Amber to off when it detects the video signal from the PC, or if it suppose to turn green.
    But first thing we need are the good clear pictures of the boards, please use GO ADVANCED to upload (paper clip symbol) the pictures.
    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

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #3
      Re: Very Very weird Help please if u can

      What series of Panasonic capacitors did you use in your monitor?

      Do you have a digital multimeter?
      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

      • LITEZONER
        GO BOLTS!
        • Mar 2010
        • 223
        • USA

        #4
        Re: Very Very weird Help please if u can

        the Led will go from Amber to off when it detects the video signal from the PC. It is suppose to go blue on detection of signal. I do have a digital VOM. The caps I used are STSI Part #:EEU-FC1E271


        Panasonic FC-Series Radial Lead Aluminum Electrolytic Capacitor, 270uf, 25v, Low ESR


        SMD Not SMD
        Body shape Radial lead type
        Polarty type Polar
        Rated voltage 25 (V)
        Capacitance 270 (micro F)
        Tolerance on capacitance -20 to 20 (%)
        Tangent of loss angle(max.) 0.14
        Leakage current(max.) 67.5 (micro A)
        Category temperature range -55 to 105 (Cel)
        Body diameter 10 (mm)
        Body length 12.5 (mm)
        Lead(terminal) pitch 5 (mm)
        Rated ripple current-1(freq.) 100000 (Hz)
        Rated ripple current-1 755 (mA)
        Rated ripple current-1(unit) mA r.m.s.(root mean square)
        Impedance-1(frequency) 100000 (Hz)
        Impedance-1(max. value) 90 (m Ohm)
        E.S.R.-2(freq.) ?
        E.S.R.-2(max. value) ?
        Endurance 3000 (h)
        Forming & packaging feature Bulk(no lead wire or terminal forming),bag packing
        Appearance P.E.T. sleeve sheathing(metal case)
        39 Soldering Iron burns And Counting

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: Very Very weird Help please if u can

          Okay those look perfectly fine, I was wondering if you used e.g. Panasonic NHG which are not suitable, but FC are very good.

          With your multimeter check the output voltages of the PSU are all good. Post a picture of the connector if you need help with this.

          The next step is then to check the LDOs on the main board which can cause lots of strange issues.
          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

          • jetadm123
            Badcaps Legend
            • Feb 2010
            • 2169

            #6
            Re: Very Very weird Help please if u can

            Panasonic FC caps are a good choice. However, one of the major mistakes people here make is replacing caps based on sight. In other words, caps don't have to be bulged to be bad. Ideally, you should have replaced all the caps ( you can leave the large 450V one alone as that rarely fails). At this point, the faster you post some photos, the faster you'll get some help.

            Comment

            • LITEZONER
              GO BOLTS!
              • Mar 2010
              • 223
              • USA

              #7
              Re: Very Very weird Help please if u can

              The power supply is 4 pins, 18.5V on 2 of them and 0 on the other two, Not sure where the low dropout regulator is or how to go about testing it.
              39 Soldering Iron burns And Counting

              Comment

              • LITEZONER
                GO BOLTS!
                • Mar 2010
                • 223
                • USA

                #8
                Re: Very Very weird Help please if u can

                Pictures
                Attached Files
                39 Soldering Iron burns And Counting

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #9
                  Re: Very Very weird Help please if u can

                  These are probably LDOs.

                  Test each.

                  To test:
                  Set meter to DC 20V.
                  Get monitor into non working state.
                  Place black probe in spare screw hole/frame of monitor for your ground.
                  Touch red probe on each pin and note the voltage. Also note if it is particularly unstable or fluctuating.
                  Report back with the voltage on each pin and the part # on the device.
                  Attached Files
                  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

                  • LITEZONER
                    GO BOLTS!
                    • Mar 2010
                    • 223
                    • USA

                    #10
                    Re: Very Very weird Help please if u can

                    the lower two units are both 1084 0257AL, The upper unit Much smaller one is 5DHL 1117L
                    The readings are in the picture, some fluctuation, but not much
                    Attached Files
                    39 Soldering Iron burns And Counting

                    Comment

                    • selldoor
                      Slow Learner
                      • Dec 2010
                      • 7870

                      #11
                      Re: Very Very weird Help please if u can

                      Those look to be ok - can you post good clear focussed pictures of the power board - A bit sharper than the previous ones which are not really sharp enough
                      for troubleshooting. Tops and bottoms please.

                      Did you try a different vga cable. Different input DVI Scart etc.
                      Have you tried it on another pc or another screen on your pc.
                      Please upload pictures using attachment function when ask for help on the repair
                      http://www.badcaps.net/forum/showthread.php?t=39740

                      Comment

                      • LITEZONER
                        GO BOLTS!
                        • Mar 2010
                        • 223
                        • USA

                        #12
                        Re: Very Very weird Help please if u can

                        My old cable is working now with my back up screen. I will take some better pictures and post on Monday when I get in. Happy Fathers Day to all you pop's out there.
                        39 Soldering Iron burns And Counting

                        Comment

                        • LITEZONER
                          GO BOLTS!
                          • Mar 2010
                          • 223
                          • USA

                          #13
                          Re: Very Very weird Help please if u can

                          More pics Hi Res. Under mag it looks like there may be something going on just above C144 on the back of the board, Not sure what it is though.
                          39 Soldering Iron burns And Counting

                          Comment

                          • LITEZONER
                            GO BOLTS!
                            • Mar 2010
                            • 223
                            • USA

                            #14
                            Re: Very Very weird Help please if u can

                            here
                            Attached Files
                            39 Soldering Iron burns And Counting

                            Comment

                            • LITEZONER
                              GO BOLTS!
                              • Mar 2010
                              • 223
                              • USA

                              #15
                              Re: Very Very weird Help please if u can

                              and here, new problem, blinking amber light now, This thing is ready for the Hot SHT Tank!
                              Attached Files
                              39 Soldering Iron burns And Counting

                              Comment

                              • LITEZONER
                                GO BOLTS!
                                • Mar 2010
                                • 223
                                • USA

                                #16
                                Re: Very Very weird Help please if u can

                                Cannot find this part anywhere, acer does not make it anymore, I wish I did not like this dang Monitor so much Part number is 55.L38VE.003
                                39 Soldering Iron burns And Counting

                                Comment

                                • selldoor
                                  Slow Learner
                                  • Dec 2010
                                  • 7870

                                  #17
                                  Re: Very Very weird Help please if u can

                                  Originally posted by LITEZONER
                                  More pics Hi Res. Under mag it looks like there may be something going on just above C144 on the back of the board, Not sure what it is though.

                                  How about a close up picture of it then? - What is on the other side.
                                  I suspect its a super Teapo cap - check its not burst at the bottom
                                  I think you are going to have to replace all the caps on this board as they are teapo (unless you have an esr meter)

                                  Please can you update your profile with country and mains voltage
                                  Please upload pictures using attachment function when ask for help on the repair
                                  http://www.badcaps.net/forum/showthread.php?t=39740

                                  Comment

                                  • selldoor
                                    Slow Learner
                                    • Dec 2010
                                    • 7870

                                    #18
                                    Re: Very Very weird Help please if u can

                                    Still no picture of power supply either?
                                    Please upload pictures using attachment function when ask for help on the repair
                                    http://www.badcaps.net/forum/showthread.php?t=39740

                                    Comment

                                    • LITEZONER
                                      GO BOLTS!
                                      • Mar 2010
                                      • 223
                                      • USA

                                      #19
                                      Re: Very Very weird Help please if u can

                                      Yes I do think that is what happened, there was some stuff on the bottom that appeared to be a solder like substance, it was hard to get off, also it seemed it came through one of the solder connections on a Cap, The solder joint in question is dirrerent that the others, it looks rough and not nice and clean like all the other solder joints. do you know where I can find these caps? TEAPO. Or would a regular electrolytic cap work? does it have to be low esr? The power supply is just a black box, I think you want me to take it apart and post a picture of it?
                                      39 Soldering Iron burns And Counting

                                      Comment

                                      • LITEZONER
                                        GO BOLTS!
                                        • Mar 2010
                                        • 223
                                        • USA

                                        #20
                                        Re: Very Very weird Help please if u can

                                        Picture 7 right above C144
                                        39 Soldering Iron burns And Counting

                                        Comment

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