USB ports

[bob]

Hi,

i found my desktop USB no longer functioning after I connect a usb hub to a
usb port connector on the motherboard. Even I remove the usb hub or reset
the cmos/bios settings dosen't help. It seems that no power output from all
the usb ports/usb port connectors. I am sure its hardware related as I have
restored the Windows image and the problem is still there. Anything I can do
now ? My motherboard is Asus P5PL2

thanks in advance

 

[Rich Barry]

Bob, does the USB Hub have it's own power? Did it work at all or did it
immediately stop functioning when you connected the
Hub? If you restored with a fresh Windows Image and it still is not
working then you are right it's hardware problem. If none of
your USB ports are working on the Motherboard if you have a vacant PCI
slot you can get a USB 2.0 PCI Card. Did you check all
8 USB 2.0 ports /USB1.1 ports on the board itself? Check below for PCI
Cards.
http://www.google.com/#hl=en&source...0&aqi=g10&oq=USB+PCI+Card&fp=cbc2f75bf9d43a8f

 

[bob]

The usb hub is passive one (without power) and I connect it via usb
connector on the m/b when the PC is shutdown. Once I boot up the PC I found
it immediate all usb ports are dead.
Yes, I checked all the ports and they all without power, since the indicator
is off on the hub and any usb flash drive., I do not have aUSB PCI to test.
8-(. Anyway, thanks for your response.

 

[Rich Barry]

Did you check in Device Manager>USB Controllers?

 

[SC Tom]

Hi,

i found my desktop USB no longer functioning after I connect a usb hub to
a usb port connector on the motherboard. Even I remove the usb hub or
reset the cmos/bios settings dosen't help. It seems that no power output
from all the usb ports/usb port connectors. I am sure its hardware related
as I have restored the Windows image and the problem is still there.
Anything I can do now ? My motherboard is Asus P5PL2

thanks in advance

Be sure USB Legacy Support is enabled in BIOS.
If you leave the hub unplugged, does anything work in any of the PC's USB
ports? Try a keyboard or mouse in each one and see if any of the ports are
dead or alive. If that works, then the fault is with the hub, not the MB. If
you are using a high requirement device, such as an Xbox 360 controller,
then that may be dragging the rest of the ports down. I have a USB sound
card, and when I would plug in my Xbox controller, the sound card would
start sounding like Jimmy Hendrix's speakers. A powered external hub solved
the problem.
If you think it may be a high drain device, go to Device Manager and open
each of the USB hub listings and look at the Power tab. If any device is
drawing 500mA or close to it, that's your problem device, and you're going
to need a powered hub.

 

[Paul]

Hi,

i found my desktop USB no longer functioning after I connect a usb hub to a
usb port connector on the motherboard. Even I remove the usb hub or reset
the cmos/bios settings dosen't help. It seems that no power output from all
the usb ports/usb port connectors. I am sure its hardware related as I have
restored the Windows image and the problem is still there. Anything I can do
now ? My motherboard is Asus P5PL2

thanks in advance

Does your motherboard have Intel ICH5/ICH5R Southbridge ?
They have a known problem, where the USB ports can fail.
This is the only public acknowledgment of a problem. In
the case of one motherboard owner, they got a new chip soldered
to their motherboard.

http://tw2005.giga-byte.com/Motherboard/Support/FAQ/FAQ_456.htm

This is an example of an ICH5 just after failure.

http://farm1.static.flickr.com/99/306837150_34ecdbc9b4_o.jpg

A failure can occur one of two ways. In a catastrophic failure,
the computer will no longer boot. The burn mark will be present
on the chip. That chip normally does not have a heatsink on
top of it, so the burn mark will be visible. The chip would be
in the lower right hand corner of the motherboard.

The burn mark appears above the balls on the bottom of the
chip, that power the USB I/O pads.

If the wires inside burn out first, before significant heat
has built up in that area, the chip may survive. The computer
in that case, continues to boot. If you look in Device Manager,
in the USB section, everything looks OK. But no matter what
USB port you plug into, nothing happens. It is possible
that is what happened to you.

ICH5/ICH5R is the only chip that this happens to with any
frequency. If you have knowledge of what chipset is inside
your computer, you may be able to figure it out. Visually
examining the motherboard, for the presence of that chip,
is one way to check.

Replacing the USB ports, by using a $10 PCI USB2 card,
is a way to work around the failure.

Another way to guess at whether you have something close
to that chip on your computer, is look in Device Manager.
The entries here 24D2, 24D4, 24D7, 24DE are USB1.1 blocks,
while the "Standard Enhanced", if you checked "Properties"
and looked at "Device ID", you might see 24DD on it. This
would hint you have the chip in question. If yours looks different,
then it could be some other problem.

http://www.usbman.com/Guides/checki4.jpg

Paul

 

[Paul]

Hi,

i found my desktop USB no longer functioning after I connect a usb hub to a
usb port connector on the motherboard. Even I remove the usb hub or reset
the cmos/bios settings dosen't help. It seems that no power output from all
the usb ports/usb port connectors. I am sure its hardware related as I have
restored the Windows image and the problem is still there. Anything I can do
now ? My motherboard is Asus P5PL2

thanks in advance

Does your motherboard have Intel ICH5/ICH5R Southbridge ?
They have a known problem, where the USB ports can fail.
This is the only public acknowledgment of a problem. In
the case of one motherboard owner, they got a new chip soldered
to their motherboard.

http://tw2005.giga-byte.com/Motherboard/Support/FAQ/FAQ_456.htm

This is an example of an ICH5 just after failure.

http://farm1.static.flickr.com/99/306837150_34ecdbc9b4_o.jpg

A failure can occur one of two ways. In a catastrophic failure,
the computer will no longer boot. The burn mark will be present
on the chip. That chip normally does not have a heatsink on
top of it, so the burn mark will be visible. The chip would be
in the lower right hand corner of the motherboard.

The burn mark appears above the balls on the bottom of the
chip, that power the USB I/O pads.

If the wires inside burn out first, before significant heat
has built up in that area, the chip may survive. The computer
in that case, continues to boot. If you look in Device Manager,
in the USB section, everything looks OK. But no matter what
USB port you plug into, nothing happens. It is possible
that is what happened to you.

ICH5/ICH5R is the only chip that this happens to with any
frequency. If you have knowledge of what chipset is inside
your computer, you may be able to figure it out. Visually
examining the motherboard, for the presence of that chip,
is one way to check.

Replacing the USB ports, by using a $10 PCI USB2 card,
is a way to work around the failure.

Another way to guess at whether you have something close
to that chip on your computer, is look in Device Manager.
The entries here 24D2, 24D4, 24D7, 24DE are USB1.1 blocks,
while the "Standard Enhanced", if you checked "Properties"
and looked at "Device ID", you might see 24DD on it. This
would hint you have the chip in question. If yours looks different,
then it could be some other problem.

http://www.usbman.com/Guides/checki4.jpg

Paul

 

[Mary Hanna]

Hi,

i found my desktop USB no longer functioning after I connect a usb hub to a
usb port connector on the motherboard. Even I remove the usb hub or reset
the cmos/bios settings dosen't help. It seems that no power output from all
the usb ports/usb port connectors. I am sure its hardware related as I have
restored the Windows image and the problem is still there. Anything I can do
now ? My motherboard is Asus P5PL2

thanks in advance

Fuse may have blown...

 

[bob]

Thanks for all your reponse.

Device manager show nothing special and the usb controller is there. I have
try to reboot it / shutdown the PC few times but without light. I just put
back the usb mouse / keyboard and still the PC doesn't recognise them. All
ports including the usb pin connector in the m/b are checked, all seems
without power out. And finally.... it restore functioning after few days
!!! Maybe it refuse to work just because its holiday !

Thanks again for all your help.