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USB Hub Issues
My Win7 64 bit Laptop is suddenly having an issue recognising any hub I plug in. In device manager I will get a message that driver software failed and there is a yellow exclamation mark next to the USB Hub. I tried 3 different hub models and all do the same thing. The hub issue isn't my long active cables; the same thing happens with a short cable right at the computer.
Now, if I "update" driver and go to the list of devices on computer and select "generic USB hub" I can sometimes get the hub to install. There is now a long list of USB Hubs in the device manager. Should I delete all of them and start over? Any idea why I would suddenly get this behavior?
A somewhat related question:
If a powered hub is connected to a computer should voltage be measured on the power in plug with plug not plugged into power source (computer on and supplying voltage to USB cable)?
Software Bisque says "no." But, I measure 4.5 volts (long extender cables?) on the power in jack of 3 different powered hubs. I don't need much power, just a bit of a boost, for my ST-i so I've been trying to power the hub from the 5 volt (1 amp max) output of the MEII. When I turn off mains power to the mount warning alarms go off in the MKS board! I've traced this back to voltage going into the mount in reverse through the 5 volt power out on the mount. I can stop the alarm with a diode in the positive lead, but the diode reduces voltage to 4.5 and the ST-i protests with a bad shutter. So, is Software Bisque correct or is this possibly a bit of an issue with the MEII and MX electronics?
Many thanks,
Peter
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