Hi David,
I have a 4400 and when I first got it, it would do what you described;
the PSU would just make clicking sounds when I tried to power it up,
and nothing else would turn on. All I did was replace the PRAM
battery, and it worked fine. I didn't check the voltages, but I know
that some macs just won't boot without the PRAM battery. I only say
this because the batteries are probably easier to find then the
PSUs :-) I don't know if they have Battery Plus stores where you are,
but that's where I went and they have a lot of different battery
types. Hope that helps,
-Cyrus
On Dec 1, 2008, at 1:27 PM, DavidV wrote:
>
> Thanks Clark
>
>> The LCs do not have soft power. They are turned on by a rocker
>> switch
>> on the back of the case.
>
> Looking the PSU, I'd tend to agree - there doesn't seem to be an
> "input" wire anywhere.
>
>> A dead PRAM battery won't prevent them from starting up but it will
>> prevent them from displaying video and booting.
>
> Does it also prevent the hard disk and fan from starting? These
> certainly don't do anything on this LC.
>
>> There is a simple bypass to a dead PRAM battery on most Macs so
>> afflicted. Turn it on, give it a couple of seconds, then quickly
>> flick
>> the power switch off and on again. Another method is to turn it on
>> then
>> give it the three fingered salute, Command-Control-Power on the power
>> supply.
>
> Well, none of those made any difference.
>
>> As to the original poster, many switching power supplies can be
>> damaged
>> (as in totally broken) by powering them up with no load. I don't
>> know
>> if the LC series is that way. I lost a power supply in Q660AV when I
>> replaced it and forgot to plug in the DC power cable.
>
> I think I'll go back to assuming that the PSU was dead when I was
> first given the LC. As I previously mentioned, it just makes a quiet
> ticking noise as if something is trying and failing to start. Ah well,
> like the dead Sinclair Spectrum it will just have to be a "for show
> only" exhibit in my personal museum until a replacement PSU comes my
> way...
>
> Thanks for the info.
>
> David
> Norwich, UK
> >
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