Hi Peter,
It's unlikely to be the TiVo, if you haven't changed any settings on it.
A few of things to confirm and check.
1. You have modified the mdmhayes.inf on the new PC's
2. You are still using a null modem adapter or have wired the cable as a
null modem
3. You have confirmed the PC's serial port and cable are working using the
paper clip loopback test
4. you are using 57600 baud on the PC, not 115200 as the picture shows and
have flow control set to none.
It's also worth trying a reboot of the TiVo, once the PC is setup and
waiting for an incoming connection.
Peter.
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