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admford

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  1. admford

    PowerBook 3400 Battery Rebuild?

    Ah, I’d suggest using INR or IMR 26650 batteries as they’d have more charging cycles before degrading. https://www.batteryequivalents.com/26650-battery-dimensions-chargers-and-flashlights.html
  2. admford

    PowerBook 3400 Battery Rebuild?

    The PowerBook 3400c uses four 3.7v 3300mAh lithium ion batteries connected in series (voltage regulated to 14.4v). Battery size is 26650. you can use four 26650 sized flat top lithium ion batteries as a replacement (3.6v rated). Interestingly enough, they’re the same type used in many vapes. But be careful regarding brand, as the effective Ah might not match what’s written on the battery case. You’d also need to do some soldering though.
  3. admford

    Trouble booting a Classic

    Well I followed Multifinder17's advice and managed to make a System 6.0.3 boot disk. The good news is that my Classic's ram is 4MB! the bad thing is that the classic won't boot from Rom or floppy with the HD connected to the SCSI port. I still have to change the battery just to be sure, but it seems more and more that the culprit is the hard disk. I'll be keeping an eye on ebay for some old SCSI hard disks that would work with the Classic. Though, I do kinda wonder what is the largest hard disk size that it can accept (in MB). The current one is the standard 40MB model, but i've found a ton of 40, 80, 480MB SCSI hard drives on say in Germany (through ebay). But they're not verified to work or have a possibility to return them if they don't.
  4. admford

    Trouble booting a Classic

    Ok, i've tried to zap the Pram, but it won't do anything. No beep saying that the pram values have been reset (other than the first beep when it turns on). From that, it seems like it might be a problem with the PRAM battery. Tomorrow i'll probably look to get a new one to replace it, and also try to boot from a floppy that i've got lying around here. I managed to get some software for windows that lets me make a boot disk for my Mac, so I shouldn't have any problems if I write the floppy from my Toshiba Libretto.
  5. admford

    Trouble booting a Classic

    Had the notion that that might be a problem, so I checked that the floppy drive doesn't have any disks in it. And also I removed the hard disk just to be doubly sure. I managed to boot using the command-Option-X-O combination when turning it on (thanks for the tip MultiFinder17). But I wasn't able to do so after I re-installed the hard disk. From the looks of it, it seems that the hard disk might be the culprit, since I hear it running, but I don't think that it's actually functioning correctly. I'll have to find a boot disk for the Classic and try to boot from it (first get a floppy drive for my MacBook to write the disk) to rule out any other components.
  6. admford

    Trouble booting a Classic

    A couple of years ago I bought a used Classic at a computer expo near my home, but never had enough time to start messing around with it. Anyways, finally today I pulled it out of storage to see if it works, but I only get a gray screen and a mouse cursor on it. I've tried booting via Command-Option-X-O, but it's like it doesn't respond to the keyboard. I've checked the inside and the mainboard seems to be in good condition and everything is seated nicely. Also noticed it had a 40MB hard drive and 2MB of additonal ram (not bad for 20 euros a couple years ago). Anyways, I'd like to get this computer working again, but really have no idea where the problem may be. At the least, I think it might be the keyboard that's broken (but the mouse, which is connected to the keyboard's ADP port, works).
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