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I have an other 2400c which is working just fine without one. End of discussion, the 2400c does NOT need a PRAM battery to boot properly.

I’ve already tried everthing, I even gave the board an ultrasonic cleaning. Since the machine stays powered on when it freezes, that suggests there’s no major power supply issue. It’s more likely to be a bad oscillator or a failing PMU-related IC.

Hi everyone, I’m currently working on three different PowerBook 2400c units, and they’re all exhibiting the same strange behavior: I have to plug and unplug the AC adapter 5 to 10 times before the machine finally gives the startup chime and powers on. Once they chime, they boot and work fine...

Update : I'm getting the movements signals on the ADB chip.

Hi, same issue here with a stock recapped SE/30. Click and keyboard are working fine. But the mouse isn't moving. Already checked broken traces underneath the ADB chip and VIA2, I even looked at the microscope, but no broken traces. What should I check next ? My analog board works fine.

But only to add more than 8 megs, right ?

I already have that from my dead board. By the way I’m using it as decoration! The 68882 isn’t gone, I’m using it in my Mac II.

Just looking for a pcb, not working of course (it’s too easy otherwise ;-))

I don’t have an accelerator; it’d probably cost more than a whole IIfx anyway. My total budget is about $50.

Hi, Sorry for the late reply, I ended up going with an ATX conversion.

I know, sadly… I’m also looking for a IIfx board. I already have one, but it’s completely destroyed by a leaky Maxwell battery. I’d like to make a recreation board, but a couple of ICs are too far gone.

Hi everyone, I’m looking for a Motorola MC68851 PMMU chip to upgrade my Macintosh II. The machine currently runs with a 68020 and I’d like to enable full virtual memory support, ideally to run A/UX or other OSes requiring a PMMU. If you have a working MC68851 (preferably tested or NOS), or a...

By the way, if UF8 (LS393) is defective, you'll get a black screen no matter what.

I'm getting something !! I don't exactly understand how it works for now, don't really now what to test. It still doesn't work on pc with the null modem cable xD

Really ? I'll be able to communicate with it ? I thought it wasn't possible. Which software should I use ?

Thanks! I bought that one :

Found that I tried to use the “hidden test mode”, but I cannot type anything on the terminal. I was using Tera Term with the good settings (9600 baud, 8 bits, 2 bits stop, no flux). Same thing on a working machine in crash state, so my mini din-8 to serial cable might be bad. Apparently some...

Unfortunately, no. The ultrasonic baths didn't change a lot. This morning I checked almost every traces around the battery, the copro and the muxes, they're all fine ! Even the vias !

Okay !!! Sorry, I feel a bit stupid right now. But at least they're correctly in place. The Mini-din 8 to serial cable is coming home...

I swear, there’s nothing on the new F258AD from Philips ! I looked under the microscope !