Crashes/reboots cuased by USB usage

[DK]

Asus A7V400-MX mainboard/Sempron 2200+/XP SP2.

The system reboots spontaneously on USB usage
(but not any USB...)

Four out of five tests stick drives trigger reboot the very
moment the contact with USB port is made. One digital
camera works fine, while the other kills the system
instantaneously. Same crash with CF memory reader.

Self-powered devices fair better: when only one instance of
any of the following is used, there is never a problem:
printer, two different USB hard drives, scanner. However,
powering any two of them simultaneously invariably brings
the system down.

Other than the USB problem, the computer is rock solid,
passes all stability tests with all voltages not deviating
appreciably from normal. I am starting to think this is not
a software problem as no amount of XP reinstalls/driver
updates and Registry fiddling with USB-related entries
ever solved the problem.

A friend this might be PSU problem but I have hard time
believing it - after all, two self-powered USB drives crash
it just the same as a USB-powered stick drive.

Any ideas? Thanks!

DK

 

[Kent_Diego]

Asus A7V400-MX mainboard/Sempron 2200+/XP SP2.

The system reboots spontaneously on USB usage
(but not any USB...)

Four out of five tests stick drives trigger reboot the very
moment the contact with USB port is made. One digital
camera works fine, while the other kills the system
instantaneously. Same crash with CF memory reader.

Self-powered devices fair better: when only one instance of
any of the following is used, there is never a problem:
printer, two different USB hard drives, scanner. However,
powering any two of them simultaneously invariably brings
the system down.

Other than the USB problem, the computer is rock solid,
passes all stability tests with all voltages not deviating
appreciably from normal. I am starting to think this is not
a software problem as no amount of XP reinstalls/driver
updates and Registry fiddling with USB-related entries
ever solved the problem.

A friend this might be PSU problem but I have hard time
believing it - after all, two self-powered USB drives crash
it just the same as a USB-powered stick drive.

Any ideas? Thanks!

I would guess it is a motherboard problem as I have fired a MB by shorting
the USB power.

 

[Paul]

Asus A7V400-MX mainboard/Sempron 2200+/XP SP2.

The system reboots spontaneously on USB usage
(but not any USB...)

Four out of five tests stick drives trigger reboot the very
moment the contact with USB port is made. One digital
camera works fine, while the other kills the system
instantaneously. Same crash with CF memory reader.

Self-powered devices fair better: when only one instance of
any of the following is used, there is never a problem:
printer, two different USB hard drives, scanner. However,
powering any two of them simultaneously invariably brings
the system down.

Other than the USB problem, the computer is rock solid,
passes all stability tests with all voltages not deviating
appreciably from normal. I am starting to think this is not
a software problem as no amount of XP reinstalls/driver
updates and Registry fiddling with USB-related entries
ever solved the problem.

A friend this might be PSU problem but I have hard time
believing it - after all, two self-powered USB drives crash
it just the same as a USB-powered stick drive.

Any ideas? Thanks!

DK

What are the USBPWR12, USBPWR34, and USBPWR56 headers set to ?
They control whether a USB port is powered by +5VSB or +5V.
The +5V has much more power delivery capability. The +5VSB
is used typically in systems, where you want to wake the
system from sleep, using a USB device. If you don't need a
USB port to be powered when the computer is sleeping,
then the +5V header choice on the above headers, is the
one to use.

Paul

 

[DK]

What are the USBPWR12, USBPWR34, and USBPWR56 headers set to ?
They control whether a USB port is powered by +5VSB or +5V.
The +5V has much more power delivery capability. The +5VSB
is used typically in systems, where you want to wake the
system from sleep, using a USB device. If you don't need a
USB port to be powered when the computer is sleeping,
then the +5V header choice on the above headers, is the
one to use.

Thanks, I wasn't aware of this option. I'll take the box apart
over the weekend to check what the change does as I am quite
certain that the default 5VSB indicated in the manual is the
one I currently have. For sure did not change jumpers when
installing it.

DK