There is a RAM card. But it's only when the Card's inserted that it freezes. Could some weird PCMCIA issue have screwed up the IDE bus? [After the first Sad Mac, I subsequently formatted the Card, wrote to it, booted from it, and then it froze and went back to Sad Mac.]
There was an (I think) 8.5 Disk Tools [floppy] System Folder on the PC card (16gb = 14.4 or so, I think) and 8.6 on the HD (which is I think 2.0gb). I'll open it up tonight or tomorrow and check the RAM card and replace the HD as a test.
[http://www.amazon.com/Digigear-PCMCIA-adapter-supports-memory/dp/B00MFVG9XO/ - This is the culprit. It was sent to me by the manufacturer as a PCMCIA replacement for a Cardbus adapter. Now that I read the description... is it possible this isn't fully PCMCIA compliant? The other adapter, which I'm returning and which is Cardbus, did read on the 5300, although it wouldn't work properly.]
There was an (I think) 8.5 Disk Tools [floppy] System Folder on the PC card (16gb = 14.4 or so, I think) and 8.6 on the HD (which is I think 2.0gb). I'll open it up tonight or tomorrow and check the RAM card and replace the HD as a test.
[http://www.amazon.com/Digigear-PCMCIA-adapter-supports-memory/dp/B00MFVG9XO/ - This is the culprit. It was sent to me by the manufacturer as a PCMCIA replacement for a Cardbus adapter. Now that I read the description... is it possible this isn't fully PCMCIA compliant? The other adapter, which I'm returning and which is Cardbus, did read on the 5300, although it wouldn't work properly.]