Iogear 4 port USB 2.0 HUB (Model GUH285) now working properly
Ok. So when i first got my hub, it worked fine and i was able to use it for all my USB needs. But for some reason it stopped working one day. Such as, it won't recognize anything i plug into it. Some things such as a flash drive will light up and then disappear, and it will not be shown on my computer. And my external HD when connected, its LED light will turn on showing its connected and on, however it will not show up anywhere on my computer. I don't think the hub is fried because it still almost recognizes stuff being plugged in. Even my ipod turns on when a USB cable is connected to it, although it will not do anything.
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If you trying to use the USB hub through the mouse port of the KVM make sure the mouse emulation has been turned off. This can be done by tapping Scroll Lock + Scroll Lock + m + Enter. This turns the mouse emulation off and causes that port to act like a direct USB connection to the computer. Instructions for this can be found in the user manual on page 14.
sometimes usb hard drives will not work through a usb hub.
if the drive works connected to the laptop but not the hub then that's how you'll have to use it.
it's also possible the laptop cannot power both the hub AND the drive, in whaich case you'll need a powered hub (one you plug in to the mains).
I don't have the original power supply for my QU2RCT7 either, but most hubs use a 5v DC power adapter, typically with a 2A. (2 amp) rating. I'm using such an adapter with my QU2RCT7 and it works fine. Make sure the adapter you select is tip-positive (ie, the "+" terminal is the "tip," or center, of the connector).
You need to unplug the power adapter from the wall, and disconnect the usb cord from the PC/laptop for at least 30 seconds. Then plug everything back in. Apparently this model suffers from static electricity from time to time. I have this hub also and it works every time.
The GCS634U is designed and tested to work only with a standard USB keyboard and mouse. However, most wireless keyboards and mice work with it, but they cannot guarantee any specific model or brand that would work correctly.
As you can see, this KVM switch is a bus powered device (meaning it only gets power from the USB ports of the computers). If the computer cannot provide enough power for the KVM switch to function correctly, then the wireless keyboard will be affected.
You may try using the IOGEAR GKM541RA. It's tested to work with the GCS634U. Or you may also try using a self-powered USB hub (meaning, it has it's own power adapter) and connect it in between the KVM switch and the computer. That self-powered USB hub will be the one that will add up power to the KVM switch and help it to function properly.
There was problem at one time with IOGear KVMs not working correctly with the USB chipset on the Dell motherboards. This problem was resolved by using a USB hub between the KVM cable and the computer. The user could take the USB portion of the KVM cable and plug it into a USB hub and then take the USB hub and plug it into the Dell computer. That should help with the problem.