>Here's a list of the possible answers people have suggested so far:
>
>-Dead PRAM battery
Check your system clock - if it is set to 1.1.1904, the PRAM battery is
dead
>-Dead logic board battery (what is the logic board battery - is it
>something other than the PRAM battery?)
to my knowledge - yes
>-Bad I/O board (the technician at MCE seems to think this could be
>the problem, even though the same thing happened after he switched
>the I/O board)
Before starting to pry into the PB or have pieces of hardware exchanged,
you might try two steps toward a soft solution � the following
descriptions and more can be found at
http://www.westwind.com/Pages/techref/pbpwrmgr.html
1.Try resetting the PRAM
Resetting the Power Manager and PRAM ------------------------------------
Resetting ("Zapping") the Parameter RAM (PRAM) when the computer is
shutdown also resets Power Manager (also called the "PG&E"). This process
resets both the power manager and the Parameter RAM.
Step 1 ------
If the computer is on, turn it off.
Step 2 ------
Make sure the Caps Lock key is not down.
Step 3 ------
Restart the computer. Immediately after hearing the startup sound,
simultaneously press and hold down the Command-Option-P-R keys. (If you
do not hold down the key combination within 5-10 seconds after the
computer restarts, you will need to repeat steps 1-3.)
Step 4 ------
Hold down the keys until you hear the startup sound again. Then release
the keys.
Step 5 ------
If the computer shuts itself off, press the reset button on the back of
the computer to turn it back on. (See chart above for location of the
reset button for your PowerBook series.)
Step 6 ------
When the computer has finished starting up, restore any custom settings
for the desktop pattern, memory, network, AppleTalk, trackpad, power
conservation and so forth.
2. Try resetting the Power Manager
PowerBook 200 and 2300 Series
=============================
Follow this procedure on the PowerBook 200 and 2300 (Duo) series
computers:
Step 1
------
Press and hold the power button on the rear of the 200 or 2300 series
computer for 30-45 seconds.*
Step 2 (see Caution)
--------------------
If resetting the power manager chip does not solve the problem, reset the
code for the power manager chip by removing all power sources and letting
the unit sit for 10 minutes. (Disconnect the AC adapter, remove the
battery and the internal backup batter.) This forces the PowerBook Duo to
reload the power manager code from the system software.
** CAUTION **
-------------
Authorized Apple Service technicians may remove the internal back up
battery to reset the power manager. If you are not an authorized Apple
Service technician, please note that removing the internal backup battery
is not a simple procedure and is not recommended. If anything is damaged
in your attempt to remove the battery, it will not be covered under
warranty.
>What Causes The Power Manager To Need Resetting?
>================================================ >
>While there are several reasons a PowerBook may need its power manager
>circuitry reset, most of which involve some kind of power interruption >to
the unit, there is one very common cause - improper use of the AC
>Adapter.
>
>The PowerBook power manager circuitry is most often "corrupted" by the >AC
Adaptor not being plugged into the PowerBook in the proper order. The >AC
Adapter should ALWAYS be plugged into the AC (wall) outlet before it >is
plugged into the PowerBook itself.
Good luck
Edgar
----------
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>
