>I tried resetting the Power Manager to boot with keyboard removed >and , of course, the keyboard installed. The Power On switch on the >case would not cause a boot. > > >I also removed the backup battery and tried booting with reset of >Power Manager. Also tried resetting the Power Manager with Main >battery installed and not installed while keyboard and backup battery >were out. Same 8-note sour chimes every time. > >The screen on this machine was perfect and the trackball worked fine >the lasat time it ran. > > It has a 24 Meg RAM chip added and would run AutoCAD R12 renderings >and redraws at a workable speed. I hate to just throw it away but >facing up to the truth, the truth is that I just about never run it, >except to admire what a neat toy it is. > >I guess all things come to an end someday and maybe today is the Day >of the Duo. > >I wonder if it's worth it to try selling it for parts on eBay? I >certainly have enough accessories to go with it. > But maybe I would run across an old 270c and be able to make one >good machine out of two bad ones. > >chris >' ' Try removing the RAM and booting it. It seems as if the 8 tone chime has something to do with faulty RAM. Paul Nelson