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So I have two Apple 3.5 inch Unidisk drives. One works fine, but the eject motor doesn't push the disc out all the way, but I can live with that. The other won't work at all. When I connect it to my //e and insert a boot disc, the light flashes, then nothing. I've tracked the issue to the analog...

So I take it that my power supply is the current issue, and needs to be recapped ASAP.  But I shouldn't wait too long on the motherboard since that's going to be a problem sooner or later, and it would be better to deal with it before it does.

It chimes after 10 to 20 minutes.  I figured that I would have to recap something, but my equipment is limited, and I've never dealt with surface mount capacitors before.  I haven't seen any sign of damage to the motherboard, but I know that the electrolytics used have a tendency to leak...

So I have a Macintosh LC III (in an LC II case) that takes about 10 to 20 minutes to power up and boot.  Once it does, it seems to work fine, but if it goes more than a few hours without a power on, it just sits there spinning its fan for an increasingly extended period with nothing on the...

To be clear, is it your monitor that won't power, or your //c?

I just searched Amazon for "150k ohm potentiometer" and found more than a few at that value.  Don't Know if they will work, but it might be worth a look? To answer your original question on if these can be repaired, the answer is usually yes.  However, you'll have to take them completely apart...

Another suggestion would be to check your belts, as well as any area where the drive is supposed to physically move for signs of damage.  It also doesn't hurt to move these components around a little manually to make sure they're moving the way they're supposed to.  You said the drive worked...

I'd take it apart and check for a bad capacitor or exploded component.  While I've never had the need to take my 5.25 in Uni apart, I have successfully repaired several Disk II drives over the past few months.  If Gorgonops is correct, then there should be two boards in the drive, the first is...

After reading your post again, I would suggest connecting the drive to your //c.  Try booting from a DOS Master and cataloging a disk in the external drive to see if it reads.  If not then try cleaning the drive head, and see if that makes a difference. The other thing I'll ask is, are your...

Just looked it up, and you're right.  Kinda weird, since I've been reversing it on my IIgs for years without a problem.  Then again, I don't have that many 3.5 in disks and even fewer that are IIgs specific, so maybe that's why I haven't run into a problem yet.

I think the daisy chain on the IIgs requires the 5.25 to be connected first, then the 3.5 after that.

Try swapping the analog cards to see if you can recreate the malfunctions on the opposite drive.  If so, then the problem is likely one or more of the ICs on the card, if the malfunctions persist regardless of the card, then it's a mechanical issue with the drive.  Also, if you can reproduce the...

Your errors might be coming from your laptop.  If the system makes any noise, that can interfere with casette line.  Computers can be chatty little things, system alerts, emails, messaging and chat alerts should all be silenced when connected to your //e.  Another thing to do is adjust the...

Try writing the disc from the Apple Disc Server: http://asciiexpress.net/diskserver/   They should have most of those.   It workes over the cassette ports.  You'll need an aux cable plugged into the port closest to the joystick port and to the headphone jack on whatever you're connected to the...

"Error # 8" is actually related to processor compatibility.  This usually means that the "Hello" or boot program was written for a 6502, and thus isn't compatible with the 65C02 processor in most later Apple 2s (including enhanced //e's).  The IIgs can sometimes boot these discs (as they have...

OMG, your right!  I was looking in the same corner of the board as my //e, but there it is J21 in the middle!  I've had this thing for years, and I never noticed.  So I everything works on a IIgs, can't wait to try it out!

To answer some of the questions I'm seeing here: First, the IIgs is compatible with nearly every Apple or Macintosh floppy drives.  The only exceptions are for PowerBooks or USB.  Personally, I rotate (since I have more computers than I have working drives) a 5.25 in, and a 3.5 in Unidisk, as...

Do you have a list of the capacitors I'll need to replace?

So I was recently given a Macintosh Classic (not a Classic II), and as one might expect, it will only give a checkerboard screen when powered.  All and all, it's a pretty common issue.  However, what's strange, is that the image isn't stable.  Upon powering, the screen flickers, and the...

I'm having an issue with my Mac SE where the video goes to a single vertical line (1 pixel thick) after about 20 minutes of use. If I turn it off, and wait about 5 seconds, it comes back, but I really don't like switching it off like that (as it's really not good for the power supply). The...