Have a 3 week old Flex 6600 that as of this morning none of the TX relay ports are working. I know the cables are good as I have tried multiple ones and I know the amp is good as my FTDX5000 is keying the amp as expected. Same cable that works from the FTDX5000 does not work on either of the TX ports on the 6600. I have been using Flex Signature Series rigs for 4 years so am very familiar with the radio hardware and the software. All had been fine for 3 weeks - used the 6600 on Friday night on the WAE RTTY contest and amp keying as expected. But no longer as of this morning. I have done a factory reset of the radio, which did not correct the issue. I know that all ports are enabled in the TX setting of the Radio Setup Section. Any thoughts on this from anyone? I assume a trouble ticket needs to be created and maybe the rig needs to be looked at. Thanks for any input, maybe I am missing something - hope that is the case.