Grundy Newbrain

From: Torben Ring <>
Date: Sat Jan 25 04:29:55 2003


I have an old Grundy Newbrain AD computer which doesn't work. The
machine powers up with random chars in the built in anode display, but
doesn't respond to keypresses. I used the machine some 20 years ago, and
when I put it away at that time it was ok.

I've checked the voltages at the 4116 RAM's and they are ok (+5, +12 and
-5 volts). The ripple is also within reasonable limits.

I don't have the schema for the machine so right new I'm pretty lost.

Is anyone able to help me out? If so, please answer directly at my email


Torben Ring
Received on Sat Jan 25 2003 - 04:29:55 GMT

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