Techknight I have a 2400c battery apart and still intact!!!! I prepped it for rebuild eventually.. It just has the top cover nicely removed with little damage.. I will take a few p…

I did dig this old thread up: https://68kmla.org/forums/index.php?/topic/7704-powerbook-520-power-pinouts/ Sadly all the pictures are gone, but it pretty much explains everything…

I havent tried it recently. I vaguely recall screwing around with a generic power supply on a 520 long long ago when mine died. Back when I was actively dicking around with these m…

the lighting is too dark, and the pictures are too blurry to make out anything useful, but its possible the PCB circuitry is similar/same to make heads and tails of my battery.  B…

Seriously, no one?

Yeh I'm quite enjoying using it actually... posting this from it in fact. I still havent worked out exactly what it's affliction to the R7k or the properly working Rage128 is yet, …

The Sonnet card will work well, and one day look out for one of their later G4 700/800/1000 upgrades which also run well in the 9600, and reliably.  It will feel like a new machine…

Sounds like all systems are go then. Might do the switcheroo then. Would I be right in assuming the majority of programs wouldn't really be able to make use of the multiprocessi…

Never heard of, Sonnet upgrades are usually very forgiving and don't tax the machine like others (with selectable bus, multiplier speeds .... Sonnet did none of that), so I'd go fo…

I remember that Applied Engineering Accelerator, Dr. Levinson  had it (along with many others), it was quite a card! I managed to get the RocketChip Manual off archive.org. The si…

Again... sorry it isn't for the 2400. You'll have to find a battery out someone willing to Crack one and take pics

External port traces run through the internal one first... except for one or two. I forget which.

My accelerated Apple IIe makes a higher pitched beep, though I believe Applied Engineering made documents available for writing software to be Accelerator Aware.  Ultima V, for exa…

that is funny your external port works.  but the internal one doesn't.    Techknight knows dead scsi traces oh so well.

That does not ring any bells for me.  Doesn't mean it never existed, but does mean that it must have been pretty obscure if it did. There were issues putting G4 upgrades into the …

I would double check polarity on your caps, and then just retouch all the solder points once more, make sure everything is good.

Nope. Open traces.

It's by no means a Lisa or 128k level of special to me, so I'll more than likely go for the LCD transplant route. Make the machine so much lighter, easier to move, and a tad more p…

Yes I connected two different known good drives internally. An 80MB and 350MB. The drives are seen and will boot the system when I put them in an external SCSI enclosure and connec…

Mmmmm at this point in time, a machine has to be fairly special to warrant me bothering with a flyback replacement. If one were to fail on either of my iMacs for instance, I dare s…

uniserver said: change the rest,   i personally do not like sockets.  if you do the ram right once its done, no need for sockets. they cause more issue then good. Click t…

Elfen said: Congrats on the fix. Click to expand... thanks

Can I assume you tried a different internal drive?

On the 3400c's lithium battery board, the black wire is the neg lead; red is the pos; the two white wires connect to tabs between the 2nd and 3rd and 3rd and 4th (I think) cells - …

change the rest,   i personally do not like sockets.  if you do the ram right once its done, no need for sockets. they cause more issue then good.