Re: Lisa 2 Repair

>
> 1. When I turn on the machine, the light under the screen turns on and the
> screen is dark for a while, and after a while a grey screen with a pattern
> of diagonal lines shows up on the screen;
>

Replace capacitor C8 on the CPU board (2,2µF next to the 68000). It gets leaky, then the 555 is not able to finish its /Reset pulse.  

> 2. I don't have a keyboard for this Lisa, but I've read that it used a TRS
> style connector. Is there, to anyone's knowledge, a converter for keyboard
> signals, either from:
>

This has to be invented first. A direct connection is not possible, you will need a protocol converter that would accept USB, PS/2 or ADB and generate Lisa Kbd signals.  

>
> 3. This computer didn't come with a floppy drive inside. Can I install a
> 400k drive from a Mac 128k or a 128k external drive?
>

Yes, it is the same drive.

I also noticed that there are 2 floppy drive ribbon cables inside the
> floppy drive cavity - is this normal?
>

Yes, that's normal. A Lisa 1 has two 26pin cables for its two Twiggy drives. A 2/5 uses one of them to connect a Sony 400k drive (via a PWM generator board for the variable motor speed). A 2/10 also has two cables, but there one is for the floppy (20pin), the other is for the hard disk (26pin).

Regards
Patrick

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