I recentyl purchased a PD-110-42-232 together with a matching power supply (12,4 V (measured), 270 mA, stabilized). Until now i was not able to communicate with the board using my desktop computer serial port (checked with a loopback cable und hyperterminal, 9600 Baud, XP defaults). Since GND, TXD and RXD of the connection are also verfied, what am I doing wrong? Could it be that 12,4 V current is to low for operation of the controller and the motor? Onboard LED flashes! Is there a way to reset the board to factory defaults by jumpers settings?