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Originally Posted by Shiraz
never had the slightest issue with QHY5L2 software, but USB hardware is a different issue. maybe try a new cable or different port and see if that makes any difference?
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Thanks Ray. I tried a different cable and different computers to no avail. My only workaround at the moment is to do a hot reboot or restart. This tends to indicate some sort of voltage or earthing problem with the camera firmware. Why this should suddenly occur is beyond me. The QHY5L-II appears to be a bit quirky. I read somewhere last week that one of the PHD2 developers with be working with QHY to try and resolve some of the guiding problems. I know from my own experience that the QHY5L-II exposure times can blow out and cause guiding problems.
Rob