USB Hub

  • Thread starter Thread starter Sgt
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Sgt

I use a 7 port hub for USB connections. The hub has it's own power supply.
For some strange reason lately when I turn the computer off the power to the
hub turns off but the lights for the USB connections remain on.Tried
unplugging the main connection to the computer and the lights remain on. I
also use power strip that controls power to individual components, this will
turn of the lights on the hub.The strip is used as a power source, each
individual component is turned and off at the part it is not turned on or
off by the power strip. What would cause the hub lights to remain on after
the computer is turned off.
Thank You.
 
Sgt said:
I use a 7 port hub for USB connections. The hub has it's own power
supply. For some strange reason lately when I turn the computer off
the power to the hub turns off but the lights for the USB
connections remain on.Tried unplugging the main connection to the
computer and the lights remain on. I also use power strip that
controls power to individual components, this will turn of the
lights on the hub.The strip is used as a power source, each
individual component is turned and off at the part it is not turned
on or off by the power strip. What would cause the hub lights to
remain on after the computer is turned off. Thank You.
Click to expand...

Power going to the hub...
 
Power for the hub is not controlled by the power strip, it's plugged to
separate wall outlet.
I also have a card reader that's plugged to a USB outlet on the front of the
computer. when the computer turns off at the card reader turns off. The hub
uses a connection at the back of the computer. Tried another USB connection,
same condition.
Thanks for your reply.
 
The hubs are self powered with a power connection to a wall outlet then this
is normal. Power is provided directly to the hub so the lights will always be
on.



Power for the hub is not controlled by the power strip, it's plugged to
separate wall outlet.
I also have a card reader that's plugged to a USB outlet on the front of the
computer. when the computer turns off at the card reader turns off. The hub
uses a connection at the back of the computer. Tried another USB connection,
same condition.
Thanks for your reply.
Click to expand...
 
Thanks for your reply. Thought maybe the hub had gone bad. Thanks again.
That makes sense because my card reader gets power from the computer.
smlunatick said:
The hubs are self powered with a power connection to a wall outlet then
this
is normal. Power is provided directly to the hub so the lights will
always be
on.
Click to expand...
 
Sgt said:
I use a 7 port hub for USB connections. The hub has it's own power supply.
For some strange reason lately when I turn the computer off the power to
the hub turns off but the lights for the USB connections remain on.Tried
unplugging the main connection to the computer and the lights remain on. I
also use power strip that controls power to individual components, this
will turn of the lights on the hub.The strip is used as a power source,
each individual component is turned and off at the part it is not turned on
or off by the power strip. What would cause the hub lights to remain on
after the computer is turned off.
Thank You.
Click to expand...

The hub should remove power from the downstream ports once the PC switches
off. Having said that, not all hubs are completely compliant in this
respect and some will continue to supply power until their own powr plug is
pulled. Further, the hub should not supply power until it has been
enumerated, but once again some hubs fail to comply.
 
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