napco 9600 stopped communicating via serial connection

[cmjindy <cmjindy@xxxxxxxxx>]

I've had a setup for about 4 years with a Napco Gemini 9600
communicating to HomeSeer without too much trouble until recently.  I
can no longer communicate with the panel using the RS232 kit.  The
serial ports on the HomeSeer computer are working fine.  I've also
tried connecting via the QuickLoader software from a second computer.
Any ideas on how to troubleshoot the panel?  Does one component fail
most of the time (e.g. the panel, automation chip, RS232 converter)?
Beyond cutting the power to the panel and disconnecting the backup
battery for a few minutes is there something else to try if the panel
communication is locked up?

I can still arm the panel from the keypads so at least the "security"
functions seem to be working.

Thanks,
Chris