Re: New Lisa Stuff

Am Freitag, 3. Januar 2014 23:54:16 UTC+1 schrieb Tom Frikker:  

> Unfortunately, this Lisa came with NiCad batteries which were extremely
> corroded (the whole motherboard is basically covered in green stuff). I've
> cleaned off the CPU card so there's no corrosion left and stuck it in my
> other Lisa 2 I have here (the one with the blank screen from a few posts
> back). Now when I turn it on, I hear the normal speaker "pop", and it boots
> up to what looks like a blank desktop and a title bar that says 'H' in the
> top right (I assume this means H ROMs).
>

This means your CPU board is working and the I/O board failed.  

> I was thinking this may be due to the leaky C8 capacitor by the 68000,
> which asserts reset indefinitely if the connection is bad. Is this a
> correct assumption?
>

As the CPU starts up and displays some video, the reset generator circuit including C8 is working properly.

Patrick

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