PowerMac 7300/200 boot problems (current)

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Hello,

On Jul 16, 2007, at 22:39, Sampson Stein wrote:

> Hah! Speak of the devil.. I get home, and the machine
was unplugged.. 
> and it
> was working before I shut it down and unplugged it, now
I plugged it 
> in and
> get the grey screen with the question mark, and OF
wants to output to a
> serial port, which I do not have the stupid mini-din
serial cable, or 
> a MacOS
> disc... looks like I'm kinda dead in the water :( I
guess the battery 
> was no
> good.

Apple used to offer a 'Network Boot Disk' floppy image for
download - 
should be enough to boot up and mount a cdrom.

have fun
Michael
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Hello,

On Jul 19, 2007, at 13:27, Sampson Stein wrote:

> +++ John Klos [freebsd] [17/07/07 02:08 +0000]:
>>> I'm mostly a PC user as well, so I dont have
any 5v DIMMS, and I'm  
>>> sure
>>> they're quite expensive. this was just
something to mess with.
>>
>> http://cgi.ebay.com/128MB-Apple-Powermac-168-pi
n-FPM-5V-Buffered- 
>> DIMM-4K_W0QQitemZ180134880033QQcmdZViewItem
>>
>> (just an example)
>>
>> These machines make excellent, reliable servers.
Make sure the  
>> motherboard battery is pretty new, or replace it
with a battery  
>> holder with two AA or AAA batteries. With that, the
machine will last  
>> forever.
>>
>> John Klos
> The motherboard battery was dead, heh... but I notice
it's one of  
> those 3.6v
> batteries like half the size of an AA batteries, but I
do have one of  
> those
> disc-looking batteries, 3.6v with three prongs on the
end, (Two neg,  
> one
> pos.. to my knowledge.) I should be good with that if I
make a holder,
> correct?

Exactly, should be an easy soldering job. Anything that
provides about  
3v should be fine.

have fun
Michael
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>> These machines make excellent, reliable servers.
Make sure the motherboard 
>> battery is pretty new, or replace it with a battery
holder with two AA or 
>> AAA batteries. With that, the machine will last
forever.

> The motherboard battery was dead, heh... but I notice
it's one of those 3.6v
> batteries like half the size of an AA batteries, but I
do have one of those
> disc-looking batteries, 3.6v with three prongs on the
end, (Two neg, one
> pos.. to my knowledge.) I should be good with that if I
make a holder,
> correct?

Those batteries are usually rechargeable. Since the
motherboard doesn't 
try to recharge the battery, that kind will die in a short
amount of time 
(weeks or months). I use two AAs because they are cheap,
easy to find, and 
anything above 2.5 volts is plenty. Also, with the amount of
draw on them, 
the batteries will likely die from shelf life expiration
before they'd die 
from the draw.

John