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Apple IIc won't boot?
- Thread starter LimeiBook86
- Start date
LimeiBook86
Well-known member
Wow, thanks for all the posts!!
I have tried to have a disk inside the IIc when I turn on the system. I even tried some external drives (which work fine on my IIGS), nothing seems to work. I'm sort of at a loss here, my hope is to one day pickup an Apple IIc Plus one day, but for now I want to try and get this one working.
Even though the above posts aren't directly related to my original issue, this makes me excited again to work on my IIc.
I'll ask my parents to bring out my Apple IIc, I'm really interesting in playing with it now that I have some more information. I hope I can get this baby working.
Thanks!
-Steve
I have tried to have a disk inside the IIc when I turn on the system. I even tried some external drives (which work fine on my IIGS), nothing seems to work. I'm sort of at a loss here, my hope is to one day pickup an Apple IIc Plus one day, but for now I want to try and get this one working.
Even though the above posts aren't directly related to my original issue, this makes me excited again to work on my IIc.
I'll ask my parents to bring out my Apple IIc, I'm really interesting in playing with it now that I have some more information. I hope I can get this baby working.
Thanks!
-Steve
david__schmidt
Well-known member
I think you want to clean the drive head. Or had you done that wile it was apart? If not, you might want to give the head a gentle swipe with a Qtip and isopropyl alcohol. This video is for cleaning an older, boxier drive - but the concept is the same:
Cosmo
Well-known member
Got an another //c yesterday wich outputs only "garbage" (i.e. random characters) on screen. Opened up the machine and cleaned up, pressed the chips. Will try today again with another monitor, cable and power supply. Or are we looking at ROM problem or so? The board itself is clean, no leaks, no corrosion etc.
Anybody have any experience with such "garbage" on screen problems with //c ?
Anybody have any experience with such "garbage" on screen problems with //c ?
david__schmidt
Well-known member
It could be a lot of things. You might start by swapping chips with your good IIc and cross-check functionality on both as you go to isolate any bad parts.
Cosmo
Well-known member
Swapping parts, i won't take that road, i don't want to risk breaking the old chips. If can find replacement CPU that's an option for sure.
Need to test with another internal power converter as well, it might be out of specs/half dead as now on power-up it will only display slight narrow "jumping" line in the middle. No noise from the disk drive etc. Not a good sign.
Need to test with another internal power converter as well, it might be out of specs/half dead as now on power-up it will only display slight narrow "jumping" line in the middle. No noise from the disk drive etc. Not a good sign.
LimeiBook86
Well-known member
Well I took this out of storage again to play with it.
Still no luck. Cleaned the floppy drive head but no luck. Also doesn't explain why a known-good external drive won't work.
However... I was reading online someone had a similar issue. The problem was the IWM chip (Integrated Wozniak Machine) which apparently controls the floppy disk drive. That could be why the system
always thinks there is no disk drive is installed. I'll keep my eye out at yard sales for a spare IIc or IIc plus. I'd love to have a working one, I have a stack of floppies just waiting to play with... I do have a working IIGS.
However in the apartment it's nicer to have a compact machine like the IIc or IIc plus.
Still no luck. Cleaned the floppy drive head but no luck. Also doesn't explain why a known-good external drive won't work.
However... I was reading online someone had a similar issue. The problem was the IWM chip (Integrated Wozniak Machine) which apparently controls the floppy disk drive. That could be why the system
always thinks there is no disk drive is installed. I'll keep my eye out at yard sales for a spare IIc or IIc plus. I'd love to have a working one, I have a stack of floppies just waiting to play with... I do have a working IIGS.
However in the apartment it's nicer to have a compact machine like the IIc or IIc plus.
Philsan
Member
I think my Apple IIc has faulty RAM chips and I would like to exchange them.
Which RAM chips should I use?
In particular, which is the right speed?
I checked my Apple IIc RAM chips and in the middle there is Apple logo followed by "mT 4264".
On the top of the chips is written, with a very little font, "8448".
There are no values such -20, -15, -1,2 -10, -8 to know their speed.
Which RAM chips should I use?
In particular, which is the right speed?
I checked my Apple IIc RAM chips and in the middle there is Apple logo followed by "mT 4264".
On the top of the chips is written, with a very little font, "8448".
There are no values such -20, -15, -1,2 -10, -8 to know their speed.
Cosmo
Well-known member
Which RAM chips is faulty? Not all? Replace just the broken one. You get the error code on screen wich shows the location of the fauwlty RAM?
I had one replaced on my //c about an year ago and i think i used one of these:
Vintage MICRON 4264P RAM MT4264-15 16-PIN DIP NOS
http://viewitem.eim.ebay.fi/Vintage-MICRON-4264P-RAM-MT426415-16PIN-DIP-NOS/370632681775/item
I had one replaced on my //c about an year ago and i think i used one of these:
Vintage MICRON 4264P RAM MT4264-15 16-PIN DIP NOS
http://viewitem.eim.ebay.fi/Vintage-MICRON-4264P-RAM-MT426415-16PIN-DIP-NOS/370632681775/item
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