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Mac Plus Black boot scene with happy mac

Mac Plus Black boot scene with happy mac Hardware 3 posts Jan 6, 2014 — Jan 6, 2014
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#1 Mon, 6 Jan 2014 - 17:10
This is a new one to me. I have a test Mac setup. Going through my motherboard surplus I put in another Plus with four 256k SIMMs I have been transferring from motherboard to motherboard. So they seem good. The issue is that immediately upon power up with this one particular board I get a flashing floppy icon surrounded by all black. When I put a floppy in, it reads and goes to a happy Mac with all black screen less icon real-estate. The Mac clears purrs along reading the floppy. This particular setup, System 6.0.x, is modified and asks to name the Mac. When the floppy stops reading, I enter a name and press return. Then the mac continues to the desktop based on the sound of the floppy reading again.

Obviously a video issue, but with the icons "working" right I am at a loss with this one.

Thoughts?

#2 Mon, 6 Jan 2014 - 17:20
Doh! Figured it out. The last two had the resistor clipped for 256k RAM. Guess I am getting rusty when I start to forget about those things.

#3 Mon, 6 Jan 2014 - 17:44
Hah! I once got a 'non working, for parts' plus that had a similar symptom. Turned out to be that resistor as well.

Good you figured it out ;)

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