Find the software at
http://macfixit.pair.com/library/tul/ResetPwrMgr.sit.hqx
p
[EMAIL PROTECTED] wrote:
> >I've got a problem here: my 2400c/upgraded with G3/240 mhz/512 k
> >refuses to wake up from sleep. What's up?
>
> 1st. Reset your powermanager. There's a program called ResetPwrMgr you might get for
>future use. Dunno where I got it. Below are 2 quotes from Seufert I've saved on Power
>Management which ought to be in a faq somewhere. . .
>
> 2nd. Maybe a dead upgrade. Mine lasted a month, but Newer replaced it promptly with
>no questions asked.
>
> Good luck.
> jpm
>
> Seufert sez:
> >If you have a solid green sleep light, the PMU is probably alive, but
>
> >it may have corrupted RAM contents or some such thing. The challenge
>
> >is to reset it, and that can be quite difficult.
> >
> >>By the way, I tried all this resetting business in all possible
> >>combinations, but to no success...
> >
> >Did you try it a lot? It took me more than 20 tries at resetting the
>
> >PMU to get my 2400 alive once. (Where each try consisted of holding
> >the reset button in continuously for 20 seconds or more... sigh.)
> >
> >>Also in other posts people hinted that even after having their 2400
> >>repaired the problems came back. Is this an engineering flaw ?
> >
> >It's hard for me to tell what the problems people are having really
> >are. I *suspect* a lot of the "dead 2400" problems are solvable by
> >resetting the PMU. But since the symptoms look like a totally dead
> >machine to most people, it usually goes to a repair shop.
> >
> >You could regard the PMU's control program as an engineering flaw. I
>
> >know that a lot of people at Apple groan every time they're doing a
> >new machine and management decides not to completely redo the PMU
> >because there isn't enough time or budget. The PMU chip and the
> >program it runs has been more or less the same since the original
> >PowerBooks; they do slight changes for each new computer to support
> >new features but most of it stays the same. Some models are known
> >for having flakier than average PMU code, and generally the 2400/3400
>
> >is considered to be about the worst. (The 2400 and 3400's electrical
>
> >design and software are virtually identical.)
>
> >It sounds like you have a badly confused PMU, the bane of all
> >PoweBooks. The basic technique for trying to start the machine up
> >again is to hold the reset button on the rear of the machine for
> >20-30 seconds or longer, then release it. Theoretically this resets
> >the PMU and gets things going; the machine should start as soon as
> >you release the button. However, one try is not always enough, and
> >the 2400 is particularly bad about this, so you may have to try a
> >lot. Sometimes you may need to use the regular power key after
> >releasing the reset button. You may hear clicks during some of this;
>
> >this is the PMU attempting to turn power on, and therefore powering
> >up the speakers, then shutting things back down.
> >
> >The green light is controlled by the PMU. If it comes on and doesn't
>
> >blink, that means the PMU is in a partial reset state.
> >
> >Oh, I almost forgot. While you're trying to reset the PMU and get
> >the machine started again, remove the battery and use only AC power.
> >It's not a safety thing, it's just something that the PMU looks for.
> >
> >
> >The PMU is probably one of the worst-done elements of Apple's
> >PowerBooks. It mostly does its job, but it is quite prone to
> >crashing and getting confused (the PMU is actually a small
> >microprocessor with its own RAM and operating system), and is far too
>
> >difficult to reset reliably. Since it controls all the power
> >circuits in the machine, if it crashes you have a PowerBook which
> >looks like it's completely dead, even though all the hardware in the
> >machine is fine.
> >
>
> ---------- Duo/2400 List, The friendliest place on the Net! A listserv for users and
>fans of Mac subportables. FAQ at Be sure to visit Mac2400!
> X-Router | Share your DSL or cable modem between multiple computers! Dr. Bott |
> Midwest Mac Parts | After-market parts for Macs. Fix your ticking dock for $59 w/
>trade-in of PS. 888-356-1104
> PowerBook Guy is | Click here! Everything PowerBook! | http://www.powerbookguy.com
----------
Duo/2400 List, The friendliest place on the Net!
A listserv for users and fans of Mac subportables.
FAQ at <http://www.themacintoshguy.com/lists/DuoListFAQ.shtml>
Be sure to visit Mac2400! <http://www.sineware.com/mac2400>
X-Router | Share your DSL or cable modem between multiple computers!
Dr. Bott | <http://www.drbott.com/prod/MIH120.html>
Midwest Mac Parts <http://www.midwestmac.com> | After-market parts
for Macs. Fix your ticking dock for $59 w/ trade-in of PS. 888-356-1104
PowerBook Guy is | Click here!
Everything PowerBook! | http://www.powerbookguy.com
