HP 49g+ and HP 50g Connectivity

[DavidM]

One thing you can try...

On the 50g, make sure that system flags -33 and -78 are both clear, which should set the calculator for using the USB port for communication. If either of those flags is set, the USB port won't be selected for communication.

Besides the usual flag methods for checking their status (FS? FS?C, etc.), you can also do the following:

• Press the [APPS] key
• Press 2, then ENTER
• Press 5, then ENTER
  

This should present you with the TRANSFER dialog. The top left field is the one to check for its current status. When set properly, you should see "USB" in that field. "IrDA" or "Serial" will disallow using the USB port for transfers.