[rescue] Odd Mac startup problem

[Andrew Weiss]

On May 1, 2004, at 2:05 PM, Phil Stracchino wrote:

> On Sat, May 01, 2004 at 01:56:30PM -0400, Nathan Raymond wrote:
>> When did you last replace the PRAM battery?  If it's not running at a
>> consistently high enough voltage, it could demonstrate the symptoms 
>> you
>> describe (in fact if the battery were complete dead, you might sit at 
>> that
>> black screen every time).
>
> Actually, I have no idea when it was last replaced.  We've only had the
> machine a few months.  It's worth looking into.
>
> What type of battery should it take, and can it be safely swapped with
> the machine running?  (Or, if not, how long do I have to swap the
> battery without losing PRAM contents?)

Most likely the 3.6v PRAM battery for Apple's at Radio Shack... about 
10-20$ @
Some macs namely Performas used a 4.5 V cube battery, but I believe the 
7300 uses the standard 3.6V cylinder.

You will lose the PRAM contents... you're supposed to... disconnect 
power.  Pop out old battery... pop in new one.

Press CUDA button or logic board reset button exactly once.  Wait 10 
seconds... connect power and continue.

Reset your time and date.

Andrew