Re: Digest for lisalist_at_email.domain.hidden - 2 updates in 1 topic

Check for a bad contact on the edge connector. Also capacitor next to the processor is known to fail and prevents lisa from starting.
but it can also be many other problems...

2018-03-01 23:38 GMT+01:00 <lisalist_at_email.domain.hidden>:

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> - CPU board not working? <#m_-3532898770756192704_group_thread_0> - 2
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> CPU board not working?
> <http://groups.google.com/group/lisalist/t/1a855f706fa65ca0?utm_source=digest&utm_medium=email>
> austjeremy_at_email.domain.hidden: Feb 28 07:49PM -0800
>
> I'm trying to get my second Lisa working. I have verified all of the parts
> on the computer are working except the CPU board. I have checked all of
> the
> removeable chips including CPU, and ROMs, in my other CPU board, and they
> are working. With the nonworking board in place, the system power light
> comes on, but nothing else happens. There is no click, nothing on the
> screen. Has anyone experienced this problem before?
> Steven Hirsch <snhirsch_at_email.domain.hidden>: Mar 01 08:54AM -0500
>
> I'm not a Lisa hardware expert, but for a first pass try to determine if
> the processor is even running. Check the various lines with a logic probe
> or scope and see if there is life anywhere.
>
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