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dcr

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  1. Unable to access the Wiki

    FWIW: https://wiki.68kmla.org/ works but https://68kmla.org/wiki/ redirects to https://68kmla.org/forums/. I could have sworn both went to the wiki last week.
  2. Yes, I'll try to get a picture of it over the weekend. Basically, it's a white horizontal line that looks about 3-5 pixels high with a 1-pixel width of space dividing it into 16 equal-width segments. I do have a second SE analog board I can try but I only have one SE motherboard.
  3. I have a goal of owning a functional, usable, original Macintosh SE (with 800k floppy drive and hard drive) and this machine is fighting that kicking and screaming every step of the way. This machine is assembled from the functional parts of two Macintosh SEs plus the CRT of an SE/30 (that was a complete unit with the exception of a missing logic board). I don't remember how many floppy drives I've tried to fix just trying to get a working 800k floppy drive for it. When I last booted it up, which was a couple months ago, it worked fine, with the exception of the floppy drive. I don't remember if it would read floppy disks; I know for sure it would not eject them. I decided to boot it up tonight to make notes of what was wrong with the floppy drive. And now it's not booting up at all. No boot chime. It sounds like a fan is running but it doesn't sound as though the hard drive is trying to spin. No hard drive light, but I don't think that was even working anyway. The screen just shows a centered horizontal line that's broken into sixteen segments, like: ----------------. Any ideas what the problem could be? Or is this machine a lost cause? Thanks!
  4. Yes, that's the thread that prompted me to purchase the donor units. I remain uncertain what capacitors to order nor can I currently afford to send the boards out to those who offer replacement service, so that's where I'm stuck.
  5. Thanks! If it was the hard drive, wouldn't I get a "?" instead of nothing? Also, on one attempt, I did have an external bootable drive connected and it didn't attempt to jump over to boot from it. But if it is the hard drive, that's an easy fix. Downside is that I was hoping to have another look at the internal hard drive to ensure I had all the files from it that I needed. I'm pretty sure I do, but wouldn't have hurt to have another look. I may wait until I get a PowerBook SCSI2SD card. That way, if it's the hard drive, I can install that while the machine is open so as to minimize wear and tear on the plastics. Yes, they are. I obtained them several weeks ago when I first read of screen issues with the PowerBook 180c. I wanted to make sure I had extra screens in case mine had gone south. One of the newer-to-me ones is still in fairly good cosmetic shape except for a broken foot. And just my luck that the other newer-to-me machine has that same foot broken.
  6. My PowerBook 180c is exhibiting symptoms I've not been able to determine the cause of. It powers up and makes the startup chime. The screen lights up like normal, but there is no Happy Mac icon nor is there a question mark. Instead, it just beeps once every few seconds. No four-tone or eight-tone error chord sequence. It's just a single beep. Any ideas as to the cause? I have two potential donor machines if needed. The first potential donor powers up, makes the startup chime and sounds like it is booting, except the screen has static-y, wavy horizontal lines. The service guide I have suggests replacing the display, converter board, inverter board, converter-to-inverter cable, interconnect board, daughterboard or motherboard which doesn't exactly help narrow things down. The second potential donor is deader than a doornail. The DC/DC converter area smells (from the outside) like something electrical burned. There was no smoke when I initially tried to power it up. Upon disassembly, I don't see anything that looks burned or damaged so I don't know if this was previously repaired and the odor remains or what. (I bought this one used.) The interconnect cable was disconnected. I was hoping that was the problem, but after connecting it and putting it back together, it's still dead. No sign of life whatsoever. My primary goal is getting my original PowerBook working, though it would be nice to get two working PowerBooks out of this trio. The original is the most important to me though, since it is the first computer I ever bought, so it'd be kind of nice to have it working again. It actually worked up until four years ago, when it stopped working in the middle of retrieving some old files. I initially thought the internal hard drive died, but that doesn't appear to be the case. Next, I've read here that the caps for the LCD screen need to be replaced. Is there a parts listing for that anywhere, preferably with purchase links? I know enough to solder electronics together when I have the parts in hand along with instructions but trying to pick out the right capacitors and other components is generally the most challenging part. Thanks!
  7. Local Talk ?

    This may help: http://atpm.com/network/setup/localtalk_serial.html
  8. Just Wondering

    This LEM article covers it and has links to other articles about it.http://lowendmac.com/2014/star-trek-apples-first-mac-os-on-intel-project/
  9. Just Wondering

    System 7.1 was ported to run on x86 Intel chips. It's too bad the source code for that isn't available, else that would probably be a good starting point for such a project. The code name for porting System 7 to Intel was the "Star Trek project" and their slogan was "To boldly go where no Mac has gone before."
  10. Just Wondering

    That would be kind of neat, depending on how it worked. Systems 6, 7, 8 and 9 are all perfectly usable operating systems, depending on your software needs. As an example, many years ago, I was perfectly content with my PowerMac 7500 which had two hard drives so I could boot into System 8 or 9. But then the credit card company decided my browser was too old and they wouldn't support it anymore. So, I bought a used Mac Mini to use for web browsing. The PowerMac 7500 remained my primary computer until I eventually got a MacBook. It would have been nice to be able to install a "modern day computer" compatibility card instead. Double-click the MDC program and a window opens up and boots Mac OS X. Then, you launch Safari, pay your credit card, read the latest headlines and watch a Vimeo video. Then, quit the program and go back to what you were doing.
  11. Uses for Older HP Inkjet Printers?

    I think they would fail at even being useful for that, unless the boat was an inflatable and the door made of balsa wood.
  12. At the office, we have a few older HP inkjet printers that were taken out of service and replaced by newer models. They were taken out of service because they stopped working for one reason or another. If I remember right, usually they had printing issues. Three are USB; two just print and the other has a scanner. There may be some pre-USB models floating around somewhere too. My thought was to just strip them down for parts like USB cable, power cord, motors, gears, assorted electronics and whatnot and just get rid of the rest. But, before I do that, does anyone know of any uses for older inkjet printers? If they were Apple models, I'd look at possibly restoring them but HP, well, meh.
  13. I was just thinking, and I don't know who would be "in charge" of doing it, but this kind of information could be useful for the wiki. That is, the wiki has a list of all the Apple computer models. If, on each entry, there was also maintenance information, that could be a huge time saver. Of course, it wouldn't be for whoever would have to type it all in.
  14. Just a follow-up note on this . . . Since reformatting and re-copying the boot disk, I was able to boot the Mac Plus with the floppy disk without a problem. The same disk was used when I booted the Mac SE from the Mac Plus's floppy drive. I have not tried booting the Mac Plus multiple times with the disk but I am guessing it appears bibilit was correct and it was the SE's apparently defective floppy drive that corrupted something on the floppy disk to cause the error on the Mac Plus. Haven't done anything as far as cleaning the floppy drive in the Mac Plus, but when I opened the Mac Plus to remove the floppy drive to temporarily install it in the SE, I found the Mac Plus needs a lot more than a floppy drive cleaning!
  15. Macintosh SE Troubleshooting

    To clarify, the floppy drive was able to eject disks until I cleaned and lubricated it which may mean I did something to cause that particular problem, but I cannot figure out what, since everything looks right and works properly if I manually work it. At any rate, I finally had the time to sit down and give DragonKid's suggestion a try. First, I booted up the Mac Plus to make sure its floppy drive worked and, more importantly, to make sure the boot floppy worked. It did. So, I removed the floppy from the Mac Plus and put it in the Mac SE. With that floppy drive, the SE booted fine. And I confirmed it has 4 MB RAM so yay! for that. Which means the SE's floppy drive is the problematic one. Are there any other things to try with it? I went through cleaning and lubrication process described in the wiki, so if that doesn't work, is it basically dead? Or do I just need to track down a working (hopefully) 800k floppy drive on eBay? (I know a 1.44 MB floppy drive will work and I'll consider that as a last resort; I'd just prefer an actual 800k floppy drive to be more authentic.)
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