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Launchpad f28027 no UART data

I have an f28027 Launchpad and cannot receive any serial data from it, using the demo app. I have:

- checked the COM port

- checked the switches on the launchpad (SCI is on)

- checked that the launchpad is functioning - LEDs are blinking appropriately

- checked the baud rate - 115200 as specified

- checked that both power LEDs are lit

I have tried with two different computers and two different launchpad boards.

I am using RealTerm, which works with other boards.

I see that it seems to be receiving some signals from the board just nothing on Rx.

Anything else I should check?