Jump to content

Forums

  1. Important Information

    1. The 68kMLA Forum Rules   (9943 visits to this link)

      To quote vintage Apple manuals: "Read Me First!"

  2. Community Connections

    1. General 68kMLA News & Stuff

      What's going down in the barracks.

      3972
      posts
    2. Conquests

      Discuss your latest vintage Mac finds!

      39269
      posts
    3. Trading Post

      Feel free to trade all of your Mac goodies here with all honest intentions. The website provider assumes NO liability, so buyer beware! Please see this topic for more information.

      52464
      posts
  3. Projects & Hosted Forums

    1. RetroChallenge

      What can you do given only one month and strictly "retro" hardware? Find out with RetroChallenge!
      http://retrochallenge.org/

      1484
      posts
    2. 68kMLA Wiki

      The creation and maintenance of the 68kMLA's information repository.
      http://68kmla.org/wiki/

      483
      posts
  4. 68k Model Forums

    1. Compact Mac

      Macintosh, 512k, SE, etc.

      45209
      posts
    2. Mac II, Quadra & Centris

      Just think, having a Quadra 950 in 1992 would be like having a Mac Pro today… except with more slots, more expandability, and on-board SCSI!

      12881
      posts
    3. 68k LC & Performa

      Ah, the consumer computers!

      7887
      posts
    4. 68k PowerBook

      From the Portable to the 190cs.

      9736
      posts
  5. PowerPC Model Forums

    1. NuBus Power Mac, LC & Performa

      The NuBus architecture gets a new brain!

      2636
      posts
    2. PCI Power Mac & Performa

      The PPC comes of age and adopts the industry standard expansion slot.

      5858
      posts
    3. G3/G4/G5 Power Mac, iMac & eMac

      From the Beige G3 to the quad-core G5, via various iMacs!

      13688
      posts
    4. PPC PowerBook & iBook

      All that power in a laptop? Never…

      8951
      posts
  6. Everything Else…

    1. Apple I, ][, /// & Lisa

      Not really 68k Macs, but certainly Vintage!

      7314
      posts
    2. Newton

      The best PDA ever finally gets its own forum!

      1063
      posts
    3. Software

      Includes system stuff, productivity, emulation, design, and games for pre-OS X Macs!

      17349
      posts
    4. Hacks & Development

      Yes, it's back! Hardware hacks/modifications and software development for Mac OS.

      18357
      posts
    5. Peripherals

      Anything you can hook up to your Mac or stuff into it as an interface!

      14434
      posts
  • Posts

    • So I'm narrowing down on bad ram, as I notice that the screen patterns change whether I install my two 1MB sticks or the two 4 MB sticks, versus no additional RAM at all. Is it really worth it to go this far and replace integrated ram, or should I just call it a day and try to sell it? I already had a hard enough time soldering the new capacitors to the logic board, I can't even imagine trying to replaced the ram... those solder pads are tiny.
    • You can use nearly any period (read: basic 8-32x CDROM only, no CDR or DVD) ATA CDROM drive in a 4400, but you'll most probably need something like CDROM Toolkit to get it to work once Mac OS loads; it should still boot from CD regardless. Try to go with brands such as Matsushita/Panasonic, Sony, Hitachi, Pioneer, Toshiba, or NEC for best compatibility; sometimes drives from less common brands such as Mitsumi, Lite-on, Philips, and cheapies like ACER drives don't work well in a Mac, and some brands like Yamaha and Ricoh have weird drive trays and buttons that don't line up with the Mac's bezel properly. What brand of USB card are you using? Macs will only use OHCI-compliant cards. The safest bet is a USB 1.1 card with an OPTi FireLink chipset since this chip was used onboard several Macs. Anything with an NEC chip should work, too. Avoid anything from VIA because they don't work at all in a Mac (and often don't even work properly in a PC either). This also goes for FireWire cards: try to use Agilent/Lucent or TI chipsets and avoid anything from VIA because they aren't going to work. Did you try posting in the Trading Post for a keyboard and mouse? Someone may be able to get you a set for a reasonable sum.
    • How would the flyback be an issue if the CRT is working correctly?
    • I dont know how to get the powersupply open for the 170. I need to replace the capacitors but cant get it open. Does anybody know how? Thanks
    • That's bad luck.   I am no expert but would myself try to confirm that the RAM is good first, as it is possible that you just have two sets of bad ram. After that I would suspect the analog board in general and the flyback transformer in particular, given the varied square and herringbone patterns.   There are others on here who are much more knowledgeable technically, however, who will hopefully chime in, though recurring questions get a little wearing to answer repeatedly....   Some resources that you may or may not know about in the meantime:   https://vintageapple.org/macbooks/pdf/The_Dead_Mac_Scrolls_1992.pdf https://www.jagshouse.com/classicrepair.html
×