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Macintosh Classic RAM not working


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Hello, I recently got my Macintosh Classic up and running. It had some system issues, but that isn't what this is about. So one day, about a month ago (before I resolved the system issue with the help of people on this forum) I took the computer off of my shelf and it wouldn't boot. It gave me some error messages and when I removed the RAM it booted again. Now with the machine running, the 1MB of onboard RAM is not enough to do anything. I tried using the expansions card without the SIMMs installed. I switched the jumper as well, and it still didn't work. Does anyone know if there is a solution?

Thanks,

Dylan

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Edited by dylan4397
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Two things come to mind – first, what error messages do you get? A Sad Mac screen will have an error code that might tell us something. Second, I notice the shunt on the expansion card is on "SIMM NOT INSTALLED" – what happens when you move it to "SIMM INSTALLED", with the extra RAM in, and try to boot? What happens without the extra SIMMs?

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The error message is 00000005 00100000 with the SIMMs installed and setting on SIMMs installed. If I remove the SIMMs, I get a white and black bar screen, as you can see in the photo. And as you can see in the second photo, I get this vertical rolling image when leave it set as SIMM installed, but remove the SIMMs

Thanks,

Dylan

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Edited by dylan4397
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Sorry, but don't understand your answer.

 

What's happening with the card card only (so without any stick of ram) and jumper moved to " simm not installed" ?

 

You have got 1 Mb of Ram onboard, the card only will give you another 1 Mb (when jumper set correctly) then the card plus sticks a maximum of 3 Mb.

 

So card alone and jumper "not installed" 1 Mb

 

Card + sticks and jumper "simm installed" 1 Mb + whatever is present.

Edited by bibilit
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Sounds good! I do have another possibly big question, that I should maybe start another discussion for. I am trying to use an ImageWriter ii with the Macintosh. I think that they were used together at one point, because I pick both of them up from the same guy. But anyways, I cannot get it to print. I looked up the different settings for the DIP switches, and tried to set it accordingly. I also think that I have the proper system files installed for the printer. They are ImageWriter, ImageWrite LQ, LaserWriter, etc. But no ImageWriter ii. Are the ImageWriter and ImageWriter ii system files the same? I will attach photos of what I have going on. I did get the self test on the printer to work, so I know it at least sort of works.

Thanks for the help,

Dylan

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The error message is 00000005 00100000 with the SIMMs installed and setting on SIMMs installed. If I remove the SIMMs, I get a white and black bar screen, as you can see in the photo. And as you can see in the second photo, I get this vertical rolling image when leave it set as SIMM installed, but remove the SIMMs

Hmm I have a classic that is showing that screen with the lines when no memory expansion is installed, and distorted bars when it is installed. Yours boots if you remove the expansion card?

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