Are you saying that another computer connects to the K3 just fine? Or that the first computer connects to a second computer? I am assuming it is the former, but I had to ask.
Did this computer talk to the K3 previously? Are you using a USB port that has been assigned as a COM port? What does Device Manager show as a driver? What does it call the port? What cable are you using, and can you try switching to another cable? Did you check Device Manager to find out what has happened to the original COM5? Do you have other apps contending for that port? It definitely sounds like a computer / cable issue, not a K3 problem. 73 Lyn, W0LEN -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Saturday, September 19, 2020 7:36 AM To: [email protected] Cc: Lu Romero W4Lt Subject: [Elecraft] Com ports behavior I have lost radio control on my K3. To find out why, I tried to connect to the K3 Utility. Com5 connects just fine at 38400 bits/sec. When I try to check for firmware, I get a "com5 is closed" message. Have spent a few hours investigating this, but no joy. I can connect just fine to a different computer. Both computers are Win10. Why would a com port that connects just fine then show as closed? 73, George K5KG ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]

