I've got a dead eMate 300 which is the only Newton I have ever come into contact with. I got it cheap (£4) on Ebay with no battery and 'Stephen was here!!' scratched into the screen (what a prat). It also had a wobbly space bar.
When plugged into a power supply, the light by the handle comes on green (and stays green) and it flashes the backlight twice a second for a while. That's it. I've found a battery for it and that made no difference. Pressing the reset button just makes it pause before starting the flashing again.
From what I've read so far this is an indication of bad memory, usually caused by a faulty upgrade card, but this eMate has no upgrade card installed. I've reseated the ROM card and cleaned the contacts. It still does it.
Is there anything else I can try or is it dead? I've not opened it up any further than the battery compartment.