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twillkickers

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  1. twillkickers

    Dead eMacs (Model A1002)

    Thanks for the links, but I've already tried resetting the PMU and replacing the battery with a fresh one. It's the first step I take whenever I try and boot an old Mac. It has done nothing for these old machines. Any other ideas?
  2. twillkickers

    Dead eMacs (Model A1002)

    Thanks for the suggestion. Most of the components are soldered on. Would you suggest first replacing the surface mount capacitors on the mainboard or the through hole capacitors on the power supply? None of the power supply capacitors have any visible bulge or leakage. In addition, the surface mount capacitors on the mainboard look ok as well.
  3. twillkickers

    Dead eMacs (Model A1002)

    Yes. They all do have RAM installed.
  4. twillkickers

    Dead eMacs (Model A1002)

    Thanks for the advice. I have replaced the battery with a fresh one, but the machine still stays dead. Any other ideas?
  5. twillkickers

    Dead eMacs (Model A1002)

    Totally dead. The fan doesn't move at all and the computer does not make any noise. Monitor doesn't even click on.
  6. twillkickers

    Dead eMacs (Model A1002)

    Thanks for the reply. All components are installed. I should have specified, these are not stripped down. Kind of wondering which components may have failed which are causing them not to start.
  7. Picked up a load of Model A1002 eMacs from the local junkyard. A couple of them are in very nice condition, but they do not boot at all. I opened them up, took a few boards out, and can't find any popped capacitors. Has anybody brought these back to life before? It would be interesting to know what common issues there are that prevent these from turning on.
  8. Picked up an old, very dusty Macintosh 7100/66 from a guy in Cincinnati about a year or so ago. Worked for a while but one day I heard some crackling noises coming from within the PSU. Unplugged it very quickly and cracked open the PSU to find the devastating scene in the attached photo. I noticed one of the IC's was fried pretty badly, so I bought a replacement and installed it. However, upon plugging in the power supply a second time, the IC fried in the same exact way it had before. I've circled it red in one of the attached photos. I really have no idea how this PSU works, but what might be frying that little chip? I'm OK at soldering, but still pretty bad at diagnosing component-level issues. I also have a lower-end fluke multi-meter so I can check diodes, capacitance, and that sort of thing. In fact, I checked the two larger caps and they were still functioning. Thanks to anyone who can give some advice! Edit: Just realised I put this in the Apple II Category by mistake. Could a mod help me move it to the PowerPC category? Thanks.
  9. twillkickers

    Trouble Installing GS/OS 6.0.1

    Just got my GGLABS RAMGS/4 in the mail, installed it, turned on DMA, and everything runs as it should! Thanks for all the advice from everyone. I'm happy to have learned something new.
  10. I have a lot of old Apple/Macintosh equipment with a lot of broken plastic tabs. Is there any reliable method for gluing/welding model pieces? Any particular glue that bonds really well with the plastic? I'd love to learn about experiences from others. For myself, I can say that Testors brand model glue seems to barely bond at all, it looks nice until you try to flex the joint at all. Thanks for the input!
  11. twillkickers

    Trouble Installing GS/OS 6.0.1

    I really appreciate the solution. Looks like I'll be getting a new RAM chip soon! I'll report back once I've installed it.
  12. twillkickers

    Trouble Installing GS/OS 6.0.1

    Thanks for the tips, I am going to try out the official apple RAM module I have at my parents' place later to see if my Applied Engineering GS-RAM is compatible with DMA. Keep in mind that it is just a little over 1MB of ram though. Speaking of which, I tried to boot just using the logic board RAM, but my IIgs only has about 155k of logic board RAM. Is there any way to solder upgrade the logic board ram on my machine? In addition, when I try to boot to the drive with DMA turned on and the Applied Engineering GS-RAM inserted, I get a "Fatal system error-> 0308" screen. Maybe that error will help explain the problem...
  13. twillkickers

    Trouble Installing GS/OS 6.0.1

    No, I do have an applied engineering ram card. Around 1mb.
  14. twillkickers

    Trouble Installing GS/OS 6.0.1

    Tried a million things and eventually guessed my way to victory. I turned off Direct Memory Access for the Sandwich II card by putting the no 1 dip switch in the open position. Any guesses as to why this worked? The only other card I have installed is Uethernet II.
  15. twillkickers

    Trouble Installing GS/OS 6.0.1

    Tried 31MB and 30MB partitions, and got the same exact error. Any other possible causes?
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