The data port of a KT8900D/KT7900D is on the back of the radio next to the external speaker port. So it is easy to plug the programming cable into the wrong port.
Also if the programming cable has a counterfeit Prolific USB-to-Serial chip (most under $20 cables and those shipped "free" with a radio) and is used with Windows, then you must roll the Prolific driver version back to v3.2.0.0 (the latest drivers are designed to be incompatible with unauthorized chip copies).
Jim
On Thu, Aug 17, 2017 at 11:26 AM, Tycen Stafford tycen@tycen.com wrote:
Check to see if you have two ports on that radio. The dataport is in the front if so. There's some confusion with that radio, the first version came out with just one port on the back that was the dataport. Then a second version came out that had a port on the back for an external speaker and the port on the front was the dataport.
# sent from my phone
On Aug 17, 2017 7:56 AM, "gary brewer via chirp_users" chirp_users@intrepid.danplanet.com wrote:
Hello k5geb. I have a talkcoop kt-8900 it is the same as the qyt kt-8900d i have tryed using chirp. And the software that comes with the radio i am unable to program it with chirp or there software all help to program this radio would be greatful .gary brewer k5geb