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  5. PowerPC Model Forums

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      The NuBus architecture gets a new brain!

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  • Posts

    • Should boot no drives and show the flashing ? (if the RAM works).
    • Hey! We're back to square one, but at least it isn't as dead as I had assumed. Voltages look fine so far all over the place, but I'm still testing.   This thing doesn't need drives hooked up to boot to the screen, does it? I know that's probably a dumb question, but this is an enormous, clunky, and (for me) somewhat rare piece of hardware, and I feel a bit out of my element just looking at it, lol.
    • True, but it could be that Apple deliberately choose dual sockets to ensure the user wouldn't apply too much pressure and break the solder joins on the pins.  With a single socket, all the force will be applied to its pins only.  With the dual sockets, that force is spread across two socket's worth of pins.
    • I don't know if what I have can be called "confidence", I just wing it and pray it works out. That's how I've been fixing things for decades and somehow it hasn't bit me in the rear; yet.   These old machines are honestly a good starting point. Plastics are fragile, but component density is much lower. The LCD controller circuit is mounted beside the screen, whereas modern units have the board stuck to the back. The isolation provided by the side-mounted board makes it a lot easier to keep heat away from the panel and eliminates the risk of applying too much pressure to the back of the screen.   But, like Byrd said, it really depends on what you want out of a vintage Mac. Classic Macintosh computers aren't always the most stable things, even when fully restored, so plenty of people would rather just keep the machines as a display piece since they have little practical use.   I just feel bad for these old computers and want to bring them back to a fully operational status and use them as originally intended. Especially ones like the 180c that weren't especially well received in their day. Once the screen is repaired I'll be rebuilding another 1xx series battery pack so I can watch the colour LCD chew threw the battery in under an hour and get that genuine 1993 Apple experience
    • One option could be manufacturing adapter boards that mate with the SE/30 (or other model) motherboard via solder tabs, also some later era LC/Quadra/Centris models with the ROM socket solder holes unpopulated and either have the ROM board directly on that, or have that board have a new ROM SIMM slots. The slot, socket, port and other connector manufacturers even when initially out of stock, will re-run batches on demand, if the batch order count is high enough. In some cases "just" 1000 pieces, which could be doable in some group funding thing.