Incomplete comdump Handshake Indication (DSR, but no CTS)

Comdump (1.6a) - Elo Touch Solutions COM Port Diagnostic

Port:  COM1 (or COM2)
Baud: 9600
Mode: Hex
Hshk: DSR
Type: (Keyboard controls explanation)

DSR indicates that power is applied to the controller.

The lack of the CTS indication can mean:

• the CTS line (pin 8 of the DB9 connector) is not connected
• there is a problem with the COM port or its connections
• the controller failed to complete its Power On Self Test (POST)