>I'm doing research on opening my 2400, and I think I understand the
>procedure for cracking it open. I understand that the pram battery is under
>the shiny plate with two screws on the motherboard (next to the ram boards).
>Also, the pram has a red wire that needs to be unplugged. It also appears
>that the pram is tucked into the side under a metal plate. How do I get it
>out of there? How do I get the new one in?
The battery itself isn't on the left under the plate (an RF shield
for the RAM I imagine). It's located just about under the trackpad
when the machine is assembled, in the lower-right corner of the main
board. A long pair of wire leads run along the bottom of the board,
around the corner, and into a plug, which is what's under the shield.
You'll also find another set of wires running the same way, but these
are for the speaker, which plugs in over on the right.
So, you do need to remove the shield to merely unplug the battery. To
actually remove and replace the battery you're going to have to
completely disassemble the computer and remove the main board, which
is a much bigger job.
If this seems like poor design to you, it is - both the long wires
everywhere and the inaccessibility of the part (though read below).
The 2400 isn't particularly well thought-out inside, and some things
seem like afterthoughts.
It actually seems possible that the locations of the speaker and PRAM
plugs got reversed in the early design stage; that or the IBM
engineers didn't know a PRAM battery would be necessary.
>It is a very unusual pram battery for the 2400. My 6100/66 has a squarish
>little battery that I simply popped in and out. Bought that one at Radio
>Shack and did it myself.
The battery in the 2400 is rechargeable (NiCad or NiMH). Most desktop
Macs prior to the iMac had non-rechargeable PRAM batteries (lithium
or alkaline). That may no longer be true of current desktops, I'm not
sure, but I suspect they're all rechargeable now.
The 2400's PRAM battery isn't really that likely to ever require
replacement (mine's still fine), and I'm not sure that replacing it
will address your problem here. You don't actually even need one at
all if there's a charged main battery in the computer at all times.
In any event, obviously try unplugging it first (two or three times
if necessary) before replacing it.
--
Marc Sira | [EMAIL PROTECTED]
"If you can't play with words, what good are they?"
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