68kMLA Classic Interface
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| Click here to select a new forum. | | Problem with IIe PDS Board for LC | Posted by: 68kbits on 2013-03-28 08:31:27
I recently aquired an LC475 with a IIe card.
The card had one of the two caps missing.
A friend on the forum was kind enough to help me out and replace the caps.
The board still isn't working.
Traces and cap contacts have been checked, but the computer continues to give the error that the IIe card is defective error #1
Clean installs of 7.5.5, 7.1, and 6.0.8 with the download of 2.2.2 IIe from Apple installed. All with no avail.
The card has been tested in multiple LC computers too, so I am faily confident the problem is not in the computer.
Before I give up on this card....
1. Does anyone have a suggestion for a common failure point?
2. Is there a nearly idiot proof install configuration to rule out a software issues.
| Posted by: Brett B. on 2013-03-28 09:17:14
Interesting, I wonder if something else on the card is damaged.
I just pulled my IIe cards out last week (I have two.) The LCIII that I tested them with has leaked caps that I have not replaced yet, but seems to be working fine.
Both cards were in good shape when I put them away years ago, now after being used, the caps are leaking. :'( One card has some weird video issues and does not display certain colors correctly. The other card will only do B&W video. I suspect that the leaked caps are the cause but I haven't had time to replace them yet.
Clearly that may not be your issue though. Are you 100% certain that the replacement caps were installed correctly? Not backwards?
| Posted by: uniserver on 2013-03-28 09:46:08
yup, I'm sure they are not in backwards 🙂
My diagnosis with this would be, Someone hooked up a unidisk or something, blew that one cap, and then handling it improperly, over a period of time, ESD might have finished off one of the main chips.
I even booted the IIe disk image, on my dual floppy LC-1 (with no hard drive) and ran the IIe Start Up app, It says: Your IIe card is defective.
looks like a no brainer.
i'd love for it to work, but it doesn't 🙁
Charles
| Posted by: Macdrone on 2013-03-28 09:56:11
I am going to have to watch out for the unidisk. I keep hearing these horror stories about it blowing up apple stuff and I do not want any part of that.
| Posted by: Nathan on 2013-04-11 12:41:00
https://groups.google.com/forum/#!msg/comp.sys.apple2/CknWCZOonyM/X6z72bBJGKAJ
This message thread elsewhere seems to suggest that there's a possibility of needed 24-bit addressing on? Does that make any sense?
Also (http://www.vectronicsappleworld.com/appleii/appleiiecard.html),
The Apple IIe Card originally shipped before System 7. The Apple IIe Card Owner's Guide for the Macintosh LC, copyright 1991, Apple Inc., advises against using the card with System 7. Furthermore, the guide states that the Apple IIe Card was tested only with version 6.0.8 of Macintosh system software. The guide suggests that if you use the card with System 7, you should have at least 4 MB of RAM and file sharing should be turned off. We use a Macintosh LC III with Mac OS 7.5.5 and have not noted any issues. We have IIe Installer Disk, Version 2.0, released in 1991. The final version is 2.2.1, released in 1993. The final version is compatible with System 7 up to Mac OS 7.5.5. From Mac OS 7.6 onwards, Macintosh system software does not support 24-bit addressing and thus is not compatible with the Apple IIe Card. Maybe you should try 2.2.1 (if you haven't alread), since the information for the 2.2.2 file (http://download.info.apple.com/Apple_Support_Area/Apple_Software_Updates/English-North_American/Apple_II/For_Macintosh/IIe_Startup_2.2.2d1_Info.txt) says that that version is for LC/Performa 575s and you say you have a LC 475.
I'll just tack this on: http://www.vintagemacworld.com/lc_card_faq.html (I'm guessing you might have read that).
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