Unfortunately, this is a continuation and worsening of previous thread http://www.diffractionlimited.com/forum/threads/stxl-6303e-timeout-failure-on-after-cooling.5720/ My camera now fails to connect almost every evening, and loses connection during observing sessions. My observing program is crippled. I have made 2 trips to the observatory, most recently yesterday, and it connected then, but tonight by remote it fails on every try, usually with "Driver Error: 8" or "Camera not found 1". There is no driver error. DriverChecker64 consistently reports drivers up to date. Firmware is up to date as of last week. USB ports and connections have been changed, no effect. USB Selective Suspend is verified Disabled x 2. All USB "Allow PC to turn off" are verified Disabled. Failure to connect is the same for CCDOps5 (up to date) and MaxIm 6.20 (up to date). On the rare occasions that the camera connects, it looks normal in Windows Device Manager. Camera is on its own dedicated USB port and uninterrupted Belkin Gold cable. All other USB items work normally. I am open to all suggestions of things I can try remotely (settings & software), but I am not making another observatory trip to test connections etc. That's been done. So if nothing has corrected this by Monday morning, I will then drive up to retrieve the camera and send it in for repair, to replace the whole USB communications circuit. Because this can't go on. Thanks for any help.