Thanks to advice offered here, I replaced the power board in the small hours of the morning. It worked; the machine bonged and started up right away after reassembly.
Ahem: not only do I have a working 2400c, but a 2400c with 80MB ram, and - what I can scarcely believe - the battery gauge is showing two and a half hours of charge on the battery, and that is with the drive spinning. The disk (3 GB) is noisy, however, and will be replaced by a CF drive, methinks, as I have done that before on a 2300c and really, really like the result.
As yet, the backup battery is not alive, but the machine has as yet been plugged in only overnight. I gather that even a new backup battery needs a few days on the mains to charge. If it does not revive, a replacement will be a must, as the machine is too fussy to go without those little coin cells.
Happiness is (just now) a functional 2400c.
Ahem: not only do I have a working 2400c, but a 2400c with 80MB ram, and - what I can scarcely believe - the battery gauge is showing two and a half hours of charge on the battery, and that is with the drive spinning. The disk (3 GB) is noisy, however, and will be replaced by a CF drive, methinks, as I have done that before on a 2300c and really, really like the result.
As yet, the backup battery is not alive, but the machine has as yet been plugged in only overnight. I gather that even a new backup battery needs a few days on the mains to charge. If it does not revive, a replacement will be a must, as the machine is too fussy to go without those little coin cells.
Happiness is (just now) a functional 2400c.