P5NSLI all usb ports died at once

P5NSLI all usb motherboard ports dead - noticed when I went to check email
yesterday morning and found mouse dead

looks like the +5 went away overnight but I've not actually measured it yet
the good news, if any, is that this is a hard failure - nothing intermittent
going on

nothing I plug in like external floppy or usb memory stick will light up or
be detected
had printer, scanner, and mouse on usb - has worked fine for a month (brand
new system)

otherwise the system has been perfect (500w ps, 2cd's, 2 ide drives, 2 sata
drives, Haupauge video card, nvidia pci-e vid card)

a few days ago, for several days, out of the blue I would get some warnings
from XP that a usb device is not recognised (no hot plugging going on, in
fact nothing plugged or unplugged for several weeks, and no power cycles
either) - but a short time later it would apparently find it because no usb
peripheral has quit working until now

what I've tried - all ports dead still
1 - unplugged front panel and back panel usb cables, still the motherboard
mounted usb's connectors still dead
2 - double checked the bios - usb is on, all three options
3 - device manager hardware - I did uncheck "allow xp to turn off usb power
to save power" (it was checked)
4 - power cycled the machine several times
5 - asus monitor prog shows 5v at 4.89
6 - uninstalled and reinstalled usb items in dev manager and again I did
uncheck "allow xp to turn off usb power to save power"

I figure there is either a 5v fuse, regulator or trace that quit. I think
there are two
Could there be a jumper that has worked loose ? I have None of the jumpers
set to allow the "boot on usb wake-up" features

What's the next step ?

On Mon, 15 Jan 2007 09:40:44 -0500, "woops"
wrote:

P5NSLI all usb motherboard ports dead - noticed when I went to check email
yesterday morning and found mouse dead

looks like the +5 went away overnight but I've not actually measured it yet
the good news, if any, is that this is a hard failure - nothing intermittent
going on

Before you junk the MB - it could be software!

I had exactly the same symptoms on my system (A8N-SLI Premium)
recently just after I had tried to fix some problems with Win XP.

Installing a clean copy of Windoze on a newly formatted partition
fixed the problem (amongst others).


Peter Finney
Liphook
Hampshire
England

Before you junk the MB - it could be software!

I had exactly the same symptoms on my system (A8N-SLI Premium)
recently just after I had tried to fix some problems with Win XP.

Installing a clean copy of Windoze on a newly formatted partition
fixed the problem (amongst others).


Peter Finney
Liphook
Hampshire
England

I've just finished restoring an Acronis image of the boot drive from a week
ago when everything was working. No success. All usb ports still dead..
Probably will try ubunto or other live linux just to be sure.

woops wrote:

Before you junk the MB - it could be software!

I had exactly the same symptoms on my system (A8N-SLI Premium)
recently just after I had tried to fix some problems with Win XP.

Installing a clean copy of Windoze on a newly formatted partition
fixed the problem (amongst others).


Peter Finney
Liphook
Hampshire
England

I've just finished restoring an Acronis image of the boot drive from a week
ago when everything was working. No success. All usb ports still dead..
Probably will try ubunto or other live linux just to be sure.


There are USBPW1 and USBPW2 on the board. USBPW1 may control power to the
back USB ports. USBPW2 might be for USB56 header. Try removing and
reinserting the jumper plug in the same position it was in currently.
Do that with the computer unplugged, to prevent accidents.

In a picture of the motherboard, there appear to be green Polyfuses
next to the USB headers. Those are automatic fuses, that close when
they cool down. If a fault is present, that could cause the fuse to
stay open. But losing all USB, including USB56 optional ports, sounds
more like a software problem. There is no history that I've heard of,
of Nvidia having problems with failing USB ports.

You might change the USBPW1 and USBPW2 selection, to the other power
source, in case the problem is a burned or open track in the motherboard.

Paul

"Paul" wrote in message ...
woops wrote:

Before you junk the MB - it could be software!

I had exactly the same symptoms on my system (A8N-SLI Premium)
recently just after I had tried to fix some problems with Win XP.

Installing a clean copy of Windoze on a newly formatted partition
fixed the problem (amongst others).


Peter Finney
Liphook
Hampshire
England

I've just finished restoring an Acronis image of the boot drive from a
week ago when everything was working. No success. All usb ports still
dead..
Probably will try ubunto or other live linux just to be sure.


There are USBPW1 and USBPW2 on the board. USBPW1 may control power to the
back USB ports. USBPW2 might be for USB56 header. Try removing and
reinserting the jumper plug in the same position it was in currently.
Do that with the computer unplugged, to prevent accidents.

In a picture of the motherboard, there appear to be green Polyfuses
next to the USB headers. Those are automatic fuses, that close when
they cool down. If a fault is present, that could cause the fuse to
stay open. But losing all USB, including USB56 optional ports, sounds
more like a software problem. There is no history that I've heard of,
of Nvidia having problems with failing USB ports.

You might change the USBPW1 and USBPW2 selection, to the other power
source, in case the problem is a burned or open track in the motherboard.

Paul

Thanks Paul, will try your suggestions this weekend. Today I installed a 5
port usb / pci card (NEC chipset) and turned off the motherboard bios usb
support. Back in full operation now, but I hate this kind of mystery.

USBPW1 and USBPW2
moved the jumpers to the other position
no change