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LaPorta

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Posts posted by LaPorta

  1. Please if you can show us a screen shot of the error. Likely, it is the usual error message about memory allocation. First, DC/BDC were designed to play on the 68000 and the were written in assembly language. They use a minimal, custom System file to boot the machine and run (usually). Using other systems is haphazard and can create memory address issues, especially machines that run in 32-bit mode with more than 8 MB RAM. The only way I know to reliably fix this is to play the game on original 68000 hardware that can run the custom System file that DC/BDC came with. It is likely that System file

    is a derivative of System 4 if memory serves, and that will not run on an LCII or IIsi. You must be using it with another System file.

     

    Alternatively, you can try and have DC start the way it was intended: with no Finder. Set startup with the DC application set to open via the Special menu (if you need instructions, we can help). You can give that a go.

  2. So I fired the propellant at every last capacitor I could find. There was one set that having fired it at made the issue all that much worse...but that was it. Nothing actually made it better or corrected it. I suppose that area is where I should concentrate my resoldering efforts.

  3. Alright, so I did a little more fooling around. So there are the two main issues: one: screen is at times wobbly, then instead of that the screen gets incredibly dark. Turning up the cutoff produces the usual bright white screen/lines of other screens, but it does nothing to make the actual picture brighter. the brightness comes and goes: the picture is otherwise incredibly crisp, the screen's image looks basically brand new. There does not seem to be a loose connection: playing with connectors/wires around the flyback, rear video board, and anode do not seem to make any difference. Sometimes it seems like messing with the rear board does something, but I think that is my mind playing tricks on me. Not sure if this is something loose inside, or what. I re-checked my solder work, and it all seems to check out fine as far as continuity. Perhaps some other part is failing? If I only knew what to look for this would be easier.

     

    Regarding the sound, I no longer have an intermittent sound issue, but at increasing volumes, there is a lot of hiss and static. I am not sure if this could be due to the capacitors I used or not. Otherwise, the sound is nice and clear when played, despite the background hiss.

     

    Lastly, when I fired it up this time it did indeed degauss.

     

    I hope someone might have any sort of insight. Let me know if videos would help at all.

  4. I performed the recap. Now I am having a whole host of other issues. Sound cuts in and out/hisses. Monitor speakers are recognized/sounds plays from them on and off. Screen flickers bright and dark on and off as well, though there is a good, sharp image. The unit does not appear to degauss when powered up. I ruled out bad power from the 6100's power jack, as I connected it directly to AC. All caps I installed tester good with my ESR meter. I have not a clue how in the world I could have caused this issue. I do have video available of just what the heck happens, but I cannot upload it here due to space issues. I suppose I could make a dropbox link or something.

     

    Any suggestions as to what could possibly cause something like this? Is it possible a different component went/ I would suspect something regarding my work since it was just completed.

  5. That is helpful. My SE looked similar, although there was only one rust spot, not two like yours. I had a very tough time getting it to work, and eventually found out that there was a corroded via underneath the SCC chip that needed repair. I was unable to desolder the chip, so I had to hack it out and get a replacement. I pretty much had to look at a radius of where the goop was before I cleaned  to track where it might still be lurking. My thread was here if you'd like to look for reference:

     

     

     

    EDIT: I did not see your request for the board until now. I am keeping it as a spare parts board in case I need anything in the future, or I may try and repair it. It is not currently functional, and I am not sure what is wrong with it. I may still have extra individual chips, though.

  6. I have an LC 520, and I was reading my nice copy of "Upgrading and Repairing Your Mac." It says inside that the 520 can be upgraded to a 575 via logic board swap. Further reading revealed that there is a PPC upgrade card for the 575. So my question is: could one then make a PPC-equipped 520 this way? Also, will the 575 accept the Apple IIe Card, and would it still work with the PPC upgrade, or does the upgrade plug into the LC Card Slot?

  7. 1 hour ago, max1zzz said:

    Very nice! The IIfx is one is one of those macs that's on my list of macs I would like, but will probably never be able to afford

     

    You never know. I got mine a bit less than a year ago. Went to a massive "pick it up for free" clearance of someone's house who ran a Mac museum. At the front of the house, there was a "not working" pile of machines. First thing I spot is a IIfx. I had to take a second look because I couldn't believe it. It was also in good shape. I picked it up immediately and brought it to my truck. When I got it home, all that needed to be done was repair of one trace, pop in a battery, and it fired up like new.

     

    I never thought I would have one either. You never know what will happen or what will come your way.

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