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WTB: Commodore 1084/1084S monitor

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  • WTB: Commodore 1084/1084S monitor

    So it looks like my Commodore 1084 monitor is either fried or on its very last legs. I would think of moving away from that particular format, but from what I can read alternatives that provide full service for a 128 are hard to come by and tend to be as expensive. I would really appreciate anyone who could point me in the direction of a working one. Or a 1902 for that matter.
    Last edited by mozartpc27; December 5, 2020, 11:10 AM.
    Commodore 128 / 1571 / 1581 / 1351 / MPS 1200 / 1084 Monitor / 64NIC+
    Commodore 64 / 1541-II (x 2)
    Commodore Plus/4 / 1551
    TI-99/4A
    Tandy CoCo 2 / Color Computer Mini-Disk 26-3029 (non-working) / Tandy Modem
    Coleco ADAM / Expansion Module 1

  • #2
    You might have more luck if you post in the Marketplace section of the forum.

    Where are you located ?

    Comment


    • #3
      Why dont you recap the 1084 and diagnose/repair any other components on it? Getting another old monitor is a bandaid maneuver at best unless you do some basic maintenance on them.

      Comment


      • #4
        Originally posted by VERAULT View Post
        Why dont you recap the 1084 and diagnose/repair any other components on it? Getting another old monitor is a bandaid maneuver at best unless you do some basic maintenance on them.
        This is a good idea, but I am afraid monitor repair is 100% not my ballgame, wouldn't even know where to begin. I am willing to try within the limits of my pretty shabby abilities, beginning with the "recapping." Any advice is appreciated.
        Commodore 128 / 1571 / 1581 / 1351 / MPS 1200 / 1084 Monitor / 64NIC+
        Commodore 64 / 1541-II (x 2)
        Commodore Plus/4 / 1551
        TI-99/4A
        Tandy CoCo 2 / Color Computer Mini-Disk 26-3029 (non-working) / Tandy Modem
        Coleco ADAM / Expansion Module 1

        Comment


        • #5
          Originally posted by zippysticks View Post
          You might have more luck if you post in the Marketplace section of the forum.

          Where are you located ?
          Will do.

          Suburban Philadelphia.
          Commodore 128 / 1571 / 1581 / 1351 / MPS 1200 / 1084 Monitor / 64NIC+
          Commodore 64 / 1541-II (x 2)
          Commodore Plus/4 / 1551
          TI-99/4A
          Tandy CoCo 2 / Color Computer Mini-Disk 26-3029 (non-working) / Tandy Modem
          Coleco ADAM / Expansion Module 1

          Comment


          • #6
            There arw a ton of videos online. If you fix a monitor it will cost a few dollsrs and may last many more years. A recplacement monitor may just last hours. And what will you do with the old.screen? Throw it out? One less viable monitor out there if you do that.

            Comment


            • #7
              Originally posted by VERAULT View Post
              There arw a ton of videos online. If you fix a monitor it will cost a few dollsrs and may last many more years. A recplacement monitor may just last hours. And what will you do with the old.screen? Throw it out? One less viable monitor out there if you do that.
              Hey, I agree, fixing is better. If I can figure it out I will. I have one old 1084S, to answer your question, that I bought, and, as you suggest, it lasted... not long at all. But I never threw it away; still have it. Took that one to be repaired, but supposedly the issue was a Flyback transformer, and I was basically informed flyback transformers for these monitors were effectively unobtanium. On that one, the picture cut out and never came back.

              On this one, the picture is cutting out, although it comes back - unfortunately the cutting out is becoming more frequent, and the time to come back is taking longer, so I suspect the same issue - a failing flyback transformer. If you have any expertise/experience with this, does it sound right? If so, I am not sure what is to be done about a failed/failing flyback. I still have the other one I could fix, if it were fixable.
              Commodore 128 / 1571 / 1581 / 1351 / MPS 1200 / 1084 Monitor / 64NIC+
              Commodore 64 / 1541-II (x 2)
              Commodore Plus/4 / 1551
              TI-99/4A
              Tandy CoCo 2 / Color Computer Mini-Disk 26-3029 (non-working) / Tandy Modem
              Coleco ADAM / Expansion Module 1

              Comment


              • #8
                I can also add, by way of information, that on the one I have currently that semi-works, the problem is much more pronounced, it seems, if I use the "Wi-Fly" modem, which I have had for a few years now and that was developed by and purchased from a user on another board. But I am not sure if it is the modem itself or running DesTerm. When I have the modem plugged in and run DesTerm, it seems the problem is more likely to occur, and it takes longer for the monitor to recover when it does. For example, this afternoon I used DesTerm briefly, and while it worked during that process the monitor cut out soon after and did not seem to be on its way back, prompting this post. Now, I have it unplugged, and while the monitor cut out once, it restored itself immediately, and has been stable since.

                This follows a pattern I noticed on Thanksgiving, when I tried to use DesTerm and the problem was bad, then later just used GEOS and it was fine. At that time I do not believe I bothered unplugging the modem, as I have done now.

                Could all be a coincidence I suppose, but since the modem is obviously using radio waves, my limited technical knowledge has me wondering about RF shielding and the like.
                Commodore 128 / 1571 / 1581 / 1351 / MPS 1200 / 1084 Monitor / 64NIC+
                Commodore 64 / 1541-II (x 2)
                Commodore Plus/4 / 1551
                TI-99/4A
                Tandy CoCo 2 / Color Computer Mini-Disk 26-3029 (non-working) / Tandy Modem
                Coleco ADAM / Expansion Module 1

                Comment


                • #9
                  The Commodore 1084, which was originally developed for the Amiga, is a very good colour monitor for the Commodore 64.

                  Comment


                  • #10
                    I have found that the flyback is not an item to go easily. It seems to get blame when it is not the culprit. I have seen the weight of a flyback brake the PCB its installed in. I just opened a thread about that here: http://www.vcfed.org/forum/showthrea...Monitor-repair
                    and I fixed an Apple IIgs monitor for a friend a week ago with the same problem (board cracked under weight of flyback).

                    You can easily see if thats the problems by taking the cover off and examining for cracks on the trace side of the PCB (expecially near the flyback)

                    Comment


                    • #11
                      Check the flyback for cracks in the solder joints that's a very common
                      problem I have fixed that problem many times..
                      Never Bin or sell your old computer's you will regret it!!
                      Vic 20 x3,C64 x2,128D,C128 flat deck,A1000 x2,A500 x3,A2000,A600,A1200,Apple ][e,2x Apple][ GS rom 01,03,Apple ][c x4 with only 1 PSU,2x Laser 128EX EX2,Atari 600XL,2x 800XL,130XE w/320 mod With a MyIDE plus,Atari 1040stf w/2.5meg..

                      Comment


                      • #12
                        I have a 1084 I was going to list on ebay. Not stereo. The boxy type, excellent shape. I am in Seattle.
                        mcdvoice mybkexperience

                        Comment


                        • #13
                          Oh my, sorry I am late on this. I will PM you.
                          Commodore 128 / 1571 / 1581 / 1351 / MPS 1200 / 1084 Monitor / 64NIC+
                          Commodore 64 / 1541-II (x 2)
                          Commodore Plus/4 / 1551
                          TI-99/4A
                          Tandy CoCo 2 / Color Computer Mini-Disk 26-3029 (non-working) / Tandy Modem
                          Coleco ADAM / Expansion Module 1

                          Comment


                          • #14
                            I'd consider selling my 1084s monitor, since I don't currently have a working computer set-up. I don't live nearby of course. The monitor does have some light screen burn-in however.

                            Comment


                            • #15
                              I managed to find a new old stock flyback for a 1084S-P on ebay fairly easily and, while the repair was pushing the envelope of my skills, it worked! It also needed a horizontal output transistor and a burned up resistor and capacitor, which I assume the flyback took with them when it failed. They were really obvious on visual inspection, though (that and the fact that they smoked when the power was on.)

                              If your issue on your 1084 is intermittent like that I would be suspicious of solder joints, especially around the flyback, but not necessarily the flyback itself unless it's making a lot of high-pitched noise when the high voltage is running.

                              If you want to get rid of your non-working 1084S I could give it a good home .

                              Cheers,
                              Greg

                              Comment

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