I have a Compaq Presario 5000 Series PC and am having problems with the serial port for the printer. The owners manual has a diagram for where plugs should go for the printer, but the plug doesn't match the size of the port. The printer has been plugged into another serial port for connecting serial peripheral devices, but the plug doesn't really fit in there either. I've had to unplug it a few times lately to downloan and update printer drivers, but it never really fit right. Maybe that's why I haven't been able to print off the internet, but still can print off notepad. I don't know. Is it possible that some of the pins in the serial port are bent from plugging and unplugging? Or maybe we have the wrong cord for connecting the printer to the PC? I have an HPdeskjet 940c series printer. Any recommendations?