USB stops responding
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Posted by on March 20, 2006, 11:23 am
Please log in for more thread options (fist time after clean install of WindowsXP Sp2) and than plugged in an Ipod. At the same moment my wireless USB mouse stopped working, the same goes for a printer Epson R320 (USB). In my attempt to solve the problem I reinstalled WindowsXP Sp2, but when I plug any USB device, the system does not recognize it, as if the device is not plugged in. Under Device Manager, all the USB entries are showing up correctly, without any errors or exclamation marks. Next, I reset a battery on motherboard and flushed a BIOS with new version (1011), formatted the hard drive and created new partitions. After that, reinstalled WindowsXP Sp1 (clean install). The result was the same; none of the USB devices is recognized by the OS. BIOS also shows "no device is connected", however power goes through the USB ports, my flash drive Sandisk Microcruzer lights up when is connected to USB port. Motherboard: ASUS P4P800 SE Please help | ||||||||||||||||||||||
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Posted by kony on March 20, 2006, 1:31 pm
Please log in for more thread options It would seem your motherboard is physically damaged. You might buy a PCI USB card, seek RMA through Asus if it's under warranty, or just buy a new board. Personally, I'd get the PCI USB card because it's the least trouble. That is, if you can live with the lack of USB mouse or keyboard until the OS loads a driver... or will a PCI USB card still provide the legacy support? I don't think it will but I haven't done any testing of it. | ||||||||||||||||||||||
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Posted by Paul on March 20, 2006, 2:03 pm
Please log in for more thread options plawrow@hotmail.com wrote:
> USB ports stopped responding. I installed new version of "itunes"
> (fist time after clean install of WindowsXP Sp2) and than plugged in an > Ipod. At the same moment my wireless USB mouse stopped working, the > same goes for a printer Epson R320 (USB). In my attempt to solve the > problem I reinstalled WindowsXP Sp2, but when I plug any USB device, > the system does not recognize it, as if the device is not plugged in. > Under Device Manager, all the USB entries are showing up correctly, > without any errors or exclamation marks. Next, I reset a battery on > motherboard and flushed a BIOS with new version (1011), formatted the > hard drive and created new partitions. After that, reinstalled > WindowsXP Sp1 (clean install). The result was the same; none of the USB > devices is recognized by the OS. BIOS also shows "no device is > connected", however power goes through the USB ports, my flash drive > Sandisk Microcruzer lights up when is connected to USB port. > > Motherboard: ASUS P4P800 SE > > Please help Kaboom. Another victim of ESD induced latchup. The USB ports inside the Southbridge are burned (just the pad driver area). This is the only public explanation of the problem. http://tw2005.giga-byte.com/Motherboard/Support/FAQ/FAQ_456.htm Either use the Asus warranty, and get it repaired (new Southbridge), or since your damage didn't kill the motherboard completely, a PCI USB2 card (one with a NEC chip on it would be good) is one way to get some USB functionality back. A PCI USB2 card will not allow a USB keyboard to program the BIOS screens, so it is not a complete solution. In the cases where the damage is more severe, there is a visible burn mark on the Southbridge, and the motherboard will no longer boot. You have the less severe form, where the power to the USB pads burns out, before the rest of the chip is toasted. Paul | ||||||||||||||||||||||
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Posted by on March 20, 2006, 4:24 pm
Please log in for more thread options Thank you for you help.
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Posted by larry moe 'n curly on March 20, 2006, 7:13 pm
Please log in for more thread options
Paul wrote: >
> Kaboom. Another victim of ESD induced latchup. The USB ports > inside the Southbridge are burned (just the pad driver area). > This is the only public explanation of the problem. > > http://tw2005.giga-byte.com/Motherboard/Support/FAQ/FAQ_456.htm It's not just ESD but also current surges. I'm always careful about ESD and touch the metal shell of any connector to the computer case before pluggiing it in, but my USB card was damaged anyway. The manufacturer said that it was because the tiny LM3526 chip blew, which, ironically, is designed to protect against current surges. The spec sheet for the chip mentioned that each USB port was supposed to have a 120uF or larger tantalum capacitor across it to supply current during plug-in, but my USB card had only 100uF regular alumium capacitors. The version of this card sold by Maxtor had 220uF capacitors instead. | ||||||||||||||||||||||
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>(fist time after clean install of WindowsXP Sp2) and than plugged in an
>Ipod. At the same moment my wireless USB mouse stopped working, the
>same goes for a printer Epson R320 (USB). In my attempt to solve the
>problem I reinstalled WindowsXP Sp2, but when I plug any USB device,
>the system does not recognize it, as if the device is not plugged in.
>Under Device Manager, all the USB entries are showing up correctly,
>without any errors or exclamation marks. Next, I reset a battery on
>motherboard and flushed a BIOS with new version (1011), formatted the
>hard drive and created new partitions. After that, reinstalled
>WindowsXP Sp1 (clean install). The result was the same; none of the USB
>devices is recognized by the OS. BIOS also shows "no device is
>connected", however power goes through the USB ports, my flash drive
>Sandisk Microcruzer lights up when is connected to USB port.
>
>Motherboard: ASUS P4P800 SE
>
>Please help