Question about 3Com (3C16593BN) 24-Port Ethernet Hub

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Hub not working properly

The hub is not working properly unless I connect a certain cable

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Maybe your hub port is not using auto sense port.

Posted on Oct 04, 2008

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Maybe you hub port is not auto sense.

Posted on Oct 04, 2008

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Either the ribbon cable is faulty or it is not making proper connection to the motherboard.
Try reseating the video cable to the motherboard before you try getting a replacement cable.

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Reconecting the cables to the hub does not make a network


Not necessarily! As long as a lan cable is connected on the wan port of your hub and the other end goes directly to the modem, the connection is correct. The remaining port will be left for the lan cables of the computers. No orders needed. Just make sure that lan cables was properly seated on the port. The LED blinking in the hub will tell you if its working or communicating with your computer. Find it, when the LED is not lit or blinking, the lan cable is not connected properly on the hub (or the other end of the lan cable is disconnected from the lan card of the computers).

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XP computer - USB slots do not work for all storage devices I plug in. Ok for example, with usb key, but will not work with external disk which I use for backup. It did work before. The usb slots at the...


There is a problem with the usb outlet not with OS. try to check if the connection from the motherboard is connected properly and if does, then there is a really problem of the usb outlet.

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4 port HUB is connected. My computer doesn't show it. Help! It is all plugged in with USB cable and when I go to MY COMPUTER it doesn't show.


The hubs usually show up in the hardware list and not as a seperate device. Only way to know it is there is to plug a usb device into it.

I devised these simple steps that tend to remedy quite a few issues with most USB portable / external hard drives and devices (though not always)

A few things to check but assumes USB and Windows for other interfaces / operating systems similar steps may be adapted to suit.

1. Ensure it is connected directly to the computer to a USB 2.0 port not a USB 1.0 port as this can have effects on performance and reliability

2. Use only the cables that came with it NOT one that fits that may have been lying around or is longer. Not all USB cables are equal even though they should be)

3. Do not connect through an external USB HUB unless that hub is USB 2.0 AND has its own power supply.

4. Use ONLY the power supply that came with it if it has an external power supply Don’t use any other unless you know it has both the same voltage and current rating e.g. 12V 500mA anything rated below that would not work properly.

5. Always use the same port for connecting your devices. Some devices do not like being switched about. If switched they may want to install software / drivers again. This can be especialy true if you move a HUB to another port

If you checked and fixed anything there and still have issues then check your hardware from CONTROL PANEL / SYSTEM / HARDWARE.
Any exclamation marks by hardware need fixing before you investigate any further

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1 Answer

Usb ports not working


Check your hardware from CONTROL PANEL / SYSTEM / HARDWARE.

Also check HP's support section on the web for any updated drivers especially for your laptops motherboard / bios

Any exclamation marks by hardware need fixing before you investigate any further
Once you have done that try some of the common fixes below.

I devised these simple steps that tend to remedy quite a few issues with most USB portable / external hard drives and devices (though not always)

A few things to check but assumes USB and Windows for other interfaces / operating systems similar steps may be adapted to suit.

1. Ensure it is connected directly to the computer to a USB 2.0 port not a USB 1.0 port as this can have effects on performance and reliability

2. Use only the cables that came with it NOT one that fits that may have been lying around or is longer. Not all USB cables are equal even though they should be)

3. Do not connect through an external USB HUB unless that hub is USB 2.0 AND has its own power supply.

4. Use ONLY the power supply that came with it if it has an external power supply Don’t use any other unless you know it has both the same voltage and current rating e.g. 12V 500mA anything rated below that would not work properly.

5. Always use the same port for connecting your devices. Some devices do not like being switched about. If switched they may want to install software / drivers again. This can be especialy true if you move a HUB to another port

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I devised these simple steps that tend to remedy quite a few issues with most USB portable / external hard drives and devices (though not always)

A few things to check but assumes USB and Windows for other interfaces / operating systems similar steps may be adapted to suit.

1. Ensure it is connected directly to the computer to a USB 2.0 port not a USB 1.0 port as this can have effects on performance and reliability

2. Use only the cables that came with it NOT one that fits that may have been lying around or is longer. Not all USB cables are equal even though they should be)

3. Do not connect through an external USB HUB unless that hub is USB 2.0 AND has its own power supply.

4. Use ONLY the power supply that came with it if it has an external power supply Don’t use any other unless you know it has both the same voltage and current rating e.g. 12V 500mA anything rated below that would not work properly.

5. Always use the same port for connecting your devices. Some devices do not like being switched about. If switched they may want to install software / drivers again. This can be especialy true if you move a HUB to another port

If you checked and fixed anything there and still have issues then check your hardware from CONTROL PANEL / SYSTEM / HARDWARE.
Any exclamation marks by hardware need fixing before you investigate any further

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1 Answer

Hiya, i have a Freeagent 250gb external harddrive that was working fine one minute but now will not connect to my computer and keeps stating that the devise is not recegnised and inturn doesnt work? any...


Hi Chris

I devised these simple steps that tend to remedy quite a few issues with most USB portable / external hard drives and devices (though not always)

A few things to check but assumes USB and Windows for other interfaces / operating systems similar steps may be adapted to suit.

1. Ensure it is connected directly to the computer to a USB 2.0 port not a USB 1.0 port as this can have effects on performance and reliability

2. Use only the cables that came with it NOT one that fits that may have been lying around or is longer. Not all USB cables are equal even though they should be)

3. Do not connect through an external USB HUB unless that hub is USB 2.0 AND has its own power supply.

4. Use ONLY the power supply that came with it if it has an external power supply Don’t use any other unless you know it has both the same voltage and current rating e.g. 12V 500mA anything rated below that would not work properly.

5. Always use the same port for connecting your devices. Some devices do not like being switched about. If switched they may want to install software / drivers again. This can be especialy true if you move a HUB to another port

If you checked and fixed anything there and still have issues then check your hardware from CONTROL PANEL / SYSTEM / HARDWARE.

Any exclamation marks by hardware need fixing before you investigate any further

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If you cannot use the drive in any way and esp. if you hear clicking or pinging then the drive is almost certainly dead or dying.

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1 Answer

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Check all cable connections
Ensure devices are powered on
Check the cable connection or to the hub ensure you have green link light
Make sure you are using the proper cables - CAT5e ? CAT6 - not crossover


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1 Answer

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Also,

As this ProCurve HP 408 is 10/100 auto sensing, you should be able to automate speed and duplex within your NICs conifiguration...

Happy Holdiays!

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