Hi. I did remove the BIOS battery, let it sit undisturbed for a while, reconnected the battery and plugged in a power supply. It then seemed to behave correctly, and it even booted up.
So problem solved? The fact remains that for a while, it did not react to pressing the power button at all, as I wrote above. Perhaps there is a self-resetting fuse inside the Odyssey that had tripped, and needed some time to cool off?
@lakshan : The unit worked fine for about a year or so. It seems to be up and running again now. But even if it seems to work now, something caused the original power supply to break down, and I can’t tell for certain if the problem was in the external power supply or in the Odyssey itself.
What is the normal current that this unit consumes from a standard 12 VDC power supply, both when completely turned off and during the bootup phase? I measured about 30 mA when off, about 600 mA immediately after the power button was pressed, is this normal?