Very Computer

Ok, this is for a friend's system....

Her system is an LC475

If she powers on her Mac, it will make the startup sound but will then stay on a
black screen forever.  If she turns it off for a while and then tries again, the
same thing happens.  However if she turns it off and then on quickly, it will
start up.  When it starts up, none of her PRAM settings are present (date is
wrong, etc...)  Doing a restart after setting everything up will also cause it
to lose the settings - but it will restart, not freeze up.

Have tried zapping PRAM but the machine just hangs as above.  Please help offer
some suggestions as to what needs to be replaced.  Backup-battery?  Some special
PRAM chip, etc?  Any help will be GREATLY appreciated (the sooner the better as
she's getting into a pretty bad panic)

Bruno

Quote:>Her system is an LC475
#2
>If she powers on her Mac, it will make the startup sound but will then
stay on a
>black screen forever.

Quote:>to lose the settings - but it will restart, not freeze up.

(Your friendly Apple dealer should be able to supply it for approx. $10 )

--
Stan Sanderson

 Wiltu den kernen haben, so moostu die schallen brechen.
...for if you want the kernel, you must break the shell.
                           -Meister Eckhart (1260-1328)

(Home page URL: <http://isbe.state.il.us/~ssanders>)

__________________________________________________________________
Jonathan E. Guyer
Dept. of Materials Science                         Zairyoo Kagakka
Northwestern University                        Noosuesutan Daigaku

Quote:> > Ok, this is for a friend's system....

> > Her system is an LC475
> Sounds olike it needs a replacement for the lithium battery that keeps
> things like the PRAM going when the machine is off (so the clock keeps
> time etc). Get an Apple dealer to install it.

There are two tabs on the back of the case, pull these up and the top
of the case will open up and will come completely off. The battery is
in a little holder with a partial cover. The cover snaps in place, so
you will need to use a small screwdriver or knife to pull the clips
free at the ends.

I bought a replacement battery at a local electronics store for $8.
Popped the new battery into place (double checked that the + end is at
the end marked with the +) and snapped the battery holder back into
place. Put the case back together the opposite of the way it opened,
and plug everything back into place. When it rebooted, it complained
about the time not being set right, but that was easy to fix. It had
also silently turned off 32-bit addressing.

I only wish it would have given me more clues as to the problem, a
black screen is rather scary. I was contemplating the cost for a new
monitor, or worse, a new computer. I wonder how many people are told,
or decide on their own that they need a whole new system because
their's is "dead".

--
#include <std/disclaimer.h>     http://www.kai.com/
David Nelson                    Kuck and Associates

(217) 356-2288                  Champaign, IL   61820

<snip>

Quote:>I only wish it would have given me more clues as to the problem, a
>black screen is rather scary. I was contemplating the cost for a new
>monitor, or worse, a new computer. I wonder how many people are told,
>or decide on their own that they need a whole new system because
>their's is "dead".

Bob

Opinions expressed are those of the author and are copyrighted
RB & Associates - Consultants in Multimedia Teleconferencing

: Ok, this is for a friend's system....

: Her system is an LC475

: If she powers on her Mac, it will make the startup sound but will then stay on a
: black screen forever.  If she turns it off for a while and then tries again, the
: same thing happens.  However if she turns it off and then on quickly, it will
: start up.  When it starts up, none of her PRAM settings are present (date is
: wrong, etc...)  Doing a restart after setting everything up will also cause it
: to lose the settings - but it will restart, not freeze up.

Symptoms of the dead motherboard battery problem. All Macs of that
vintage are having the same problems.

: Have tried zapping PRAM but the machine just hangs as above.  Please help offer
: some suggestions as to what needs to be replaced.  Backup-battery?  Some special
: PRAM chip, etc?  Any help will be GREATLY appreciated (the sooner the better as
: she's getting into a pretty bad panic)

Look at the URL is my .sig for directions on how to replace the battery.
It is very simple in an LC 475.

: Bruno

And to answer another posted note - the clock chip would have nothing to
do with losing monitor depth, date, etc. I have chipped two Q 605 type
computers and nothing like that happened. When I got a bad resistor, it
just wouldn't boot.

--
Charles D Phillips

Check my recycling Web page at:
www.academ.com/houston/recycling

Check my motherboard battery Web page at:
www.academ.com/info/macintosh

"I Don't Do Windows, I Have A Macintosh"

Thanks to all that replied and so quickly.

Bruno

I believe the specs on the battery are: 3.6 volt Lithium

Pull your current battery and try Radio Shack or a well-stocked
computer store. If not a soul has one, start going for mailorder.