I agree with Al, using another PS for the HD is a good idea to try. Also,
the 1.2 amp PS is not all that bad, she has some reserve power built in for
the 3 expansion slots. The original Twiggys used more power than the 3.5"
drive does, and the SUN units may use less power than the apple Widget does.
You may want to check the output of 1.2 PS, if the voltage is low (it's
adjustable), the current load will rise. My Lisa2 with a 1.2amp PS and an
internal HD has been running daily since 1991 proving the unit can be
reliable.
Rick
> From: "Nord, Al" <Norda_at_email.domain.hidden>
> Reply-To: "LisaList" <lisalist_at_email.domain.hidden>
> Date: Mon, 24 Oct 2005 13:29:36 -0500
> To: "LisaList" <lisalist_at_email.domain.hidden>
> Subject: Re: Lisa keeps shutting itself off
>
> My 2 cents worth.
> Instead of trying to find a Lisa 1.8 amp power supply why not connect a
> spare computer power supply to power the internal harddrive. That is
> cheaper then finding a Lisa power supply. Maybe I should design
> something to backpack on the Lisa's case and make a spare 1 buck 3.80
> for my efforts.
> Al
>
> -----Original Message-----
> From: LisaList [mailto:lisalist_at_email.domain.hidden] On Behalf Of macmoni
> Sent: Monday, October 24, 2005 1:07 PM
> To: LisaList
> Subject: Re: Lisa keeps shutting itself off
>
> Hi !
>
> let me make some additional remarks:
>
>>> My Lisa indeed has a 1.2A power supply (no idea why Sun Remarketing
>>> decided to keep it hobbled with the original PSU after they installed
>
>>> a hard drive in it...).
>>
>> __The 1.2 amp PSUs do have a temp sensor in them which will shut the
>> system down if it overheats.
> Well, this doesn't cause a proper shutting down Lisa. I don't believe,
> that this is an overtemp-problem at all.
>>
>> I would try turning down the brightness on the back of the machine
>> along with a fan blowing on the PSU. With the brightness lower, there
>> is less load on the PSU.
> Yes, but this will not solve the problem :-)
>
> If you want to run your Lisa with an internal hard drive, you must have
> an 1.8A PS. Everything else makes no sense. Unplug the HD and try to
> boot your Lisa from disk(s), it should not shut down. If she does, then
> remove one Memory-Board if you have two inserted and interchange the
> Boards, perhaps there's something like a "Stack-Overflow" due to a weak
> Mem-Board, which will cause the Lisa to reboot.
> Of course it IS NOT a "Stack-Overflow", but I don't know the english
> word of that technical expression :-)
>
> I speak much better german than english :-)
>
> greetings TOM from Bavaria, the center of europe, the marvellous castles
> of Koenig Ludwig e.g. Neuschwanstein and last but not least the original
> Oktoberfest !
>
>
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Received on 2005-10-24 13:22:00