Sometimes the pen does not hold in its place anymore. This can be caused of two reasons:
1. The holding mechanism has been locked. Try to spread the place right beneath the serial connector port with your thumbnail.
2. The holding mechanism has been broken. Then you need this spare part for replacement.
The Do-It-Yourself-Repair is quite easy to handle, no soldering needed.
Fits for Psion 5 calssic (8 MB), 5mx 16 MB, 5mxPRO 24/32 MB, Ericsson MC218.
What you get: brand new pen catch.