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I got both modules very cheap with a 520c and a 540c. The owners didn't really know what they were selling.  :lol:

I'll try the Rev. B booting again, later.  I'm refurbishing my three 540c before.  They are really good machines.  :mrgreen:

I assume you formatted the card with HFS, not HFS+.  Your standard PB 540c: does it have a working PRAM- or main-battery? Mine doesn't boot that way. Main battery dead, PRAM battery new. 

Some more infos: Name:         PC Card Software Version:      2.0 Released:     April, 1996 Description:  This software is for the PowerBook 500 series Rev C PCMCIA expansion module only and is required in order to use that module. This software will not update a Rev A or Rev B module to a...

I suppose Apple repaired their CF card drivers for Rev. B in MacOS 8.1, but inside, without extensions.  Rev. B allows to format a card in HFS+ so it can be used on a recent Mac for exchanging files, but Rev. B doesn't like more than one partion on a card. It wants to format this card. Limit is...

My Rev. B card cage (Apple M2864 V1/B) was working, when I got it some years ago with a PowerBook 520c. But only for a short time, so I thought it became defective.  Yesterday I've read these posts: https://www.mail-archive.com/powerbooks@mail.maclaunch.com/msg07749.html    and it made me...

After hours of connected to the power supply the PowerBook 540c now holds all it's PRAM settings, when disconnected for some time.  [8D]

Two of these batteries fit, must be soldered to the old cable. 

Maybe PB 500 series.  I tried this with several PowerBooks 5300, as all of their main batteries leaked and are dead.  All PRAM batteries of them are charged by the power supply board, when they are sitting for hours connected to the power supply. 

No difference with the new batteries. As I don't have a working main battery for my PB 540c, I let it sit provided with the power supply. Maybe after some hours I notice a result. 

I'll see it soon: I have replaced the PRAM batteries and I'm reassembling the PowerBook now. 

Hi there, I own 3 PowerBook 540c and I'm very happy with them. One has a SCSI2CF and another has a SCSI2SD built in, everything works but all 3 have a little problem: after a few minutes without power supply, my PRAM settings disappear. Date & time and energy store are deleted. Date &amp...

I also use IDE2CF in my PowerBook 150: I formatted the CF card in the PCMCIA Slot of my Wallstreet (low level format). Made some partions and use it in my PB 150. No problems until now. 

yes, I do.  As far as I know there are only problems with Duo power supply used with PB 2400c.

My second 5300ce also doesn't start with it's trackpad connected.  I think I have to clean all contacts...

I had new problems again: got GLOD and couldn't start again for days.  So I tried to find the failure again: it was the trackpad. When I removed it, the 5300ce booted immediately. And still does always. I'll try a second trackpad (I bought 5 PB 5300 some years ago). Interesting new "feature"...

Yes, this is the "usual" fast way. :) But does't work on System 7.x. 

I copied the idea from "jrwil", thanks to him:

Timbuktu has it's own protocol.  I can easily copy files between my recent Mac and my SE/30 and many PowerBooks (except PB 1xx). I've written a "How to do" - sorry it's in German only - but when you look at the pictures you can see how it works: https://www.mediafire.com/download/5rd01rj1hrq6g34

Networking between PowerBooks and recent Macs can be done with Timbuktu with Ethernet (-card) on PowerBooks.  Timbuktu v4.6 on old Macs (OS 7.x, 8.x, 9.x) v8.8.5 on recent Macs (find files in Macintosh Garden, Tumbuktu is not sold anymore). I do this regulary.