Timothy A. Seufert <[EMAIL PROTECTED]> wrote:
>
> At 11:49 AM +0100 2/15/00, Sidney Ho wrote:
>
>>You have two procedures.
>>SIMPLE--Without taking it apart, pull battery, pull AC, let sit 2-3 days.
>>Reset Power Manager for 40-60 sec. You should not get any green light as
>>everything should be completely discharged. Then connect AC only (you must
>>have a reliable power supply) and press power button for a normal restart.
>>
>>COMPLEX--take 2400 apart. Check seating of CPU and RAM cards, all cables and
>>screws. Leave disassembled for a few days to discharge everything.
>>Reassemble. Follow above procedures.
>>
>>Well over 50 pct chance it will boot successfully. If it doesn't work, let
>>it sit a week, battery out and AC disconnected and try again (assuming
>>you've checked the innards).
>
> Don't forget:
>
> SIMPLER -- Reset the PMU by playing with the reset button on back.
> The correct procedure for PMU reset is: remove battery, plug in AC.
> Hold down reset button for 20-30 seconds, release. It may take a lot
> of repetitions for this to work!
Quite right! But, like you, I tend to find the orthodox treatment nearly
useless. After many series of 10-12 attempts in the past, usually
characterized by 2400 behavior increasingly resembling a terminal hardware
problem, I usually just go straight to this procedure now and skip "SIMPLER"
after one or two attempts. I also let it sit more than a few hours because I
suspect a residual charge even after the green diode is extinguished. It
seems the longer you "age" a PM / PRAM corrupted 2400, the easier it is to
revive. Obviously after I leave mine in pieces, inertia takes over as I use
another PB. Come to think of it, I've probably had to mess with PM / PRAM
resets more with a 2400 than all of the many Macs I've ever owned or helped
friends with combined. This is the peculiar bane of the 2400--but it can be
overcome with serious persistence.
---
Sidney Ho
[EMAIL PROTECTED]
----------
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>
PowerBook Guy is | Click here!
Everything PowerBook! | http://www.powerbookguy.com
Midwest Mac Parts ][ <http://www.midwestmac.com>
After-market parts for Macs. ][ 888-356-1104 ][
MacResQ Reader Specials: 2.5GB Seagate SCSI: $119, 4GB IBM SCSI: $199,
Norton Util. 4.0: $29, Mac Parts, Systems & Repairs <http://www.macresq.com>
