Duo 230 External Power problem

[W. Sheldon Lee]

I have a Duo 230 with a damaged power connector. The battery is long 
dead, but it can be run off of an external power supply. However, that 
is very inconsistent, as you have to push and hold the connector just 
so on the back of the computer in order to keep the power flowing. Does 
anyone know where I can get instructions to take the computer apart and 
see if there is anything loose on the jack that could be repaired?

Thanks