A7V8X-MX SE USB problems

  • Thread starter Thread starter Andre Piancastelli
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Andre Piancastelli

Hello all!

I'm having problems with USB 2.0 and my A7V8X-MX SE MoBo. I've
installed win xp SP1, it´s all recognized in the device manager, USB
is enabled in the BIOS, but when I plug in any device it's totally
dead. It looks like there´s no power on the USB slots, my memory key
light is never on, nor it's recognized.

System is:

Athlon XP2600+
512MB RAM
120 GB HD Samsung
A7v8x-x MB

Going nuts, help really appreciated

Thankz
 
Hello all!

I'm having problems with USB 2.0 and my A7V8X-MX SE MoBo. I've
installed win xp SP1, it´s all recognized in the device manager, USB
is enabled in the BIOS, but when I plug in any device it's totally
dead. It looks like there´s no power on the USB slots, my memory key
light is never on, nor it's recognized.

System is:

Athlon XP2600+
512MB RAM
120 GB HD Samsung
A7v8x-x MB

Going nuts, help really appreciated

Thankz
Click to expand...

Check your USBPWR12 and USBPWR34 headers. There are two 1x3 headers
next to each other, and the jumpers run vertical, not horizontal.


X X

<--- A jumper must be present on each
1x3 set of pins. One position is
+5V (shown here) and the
X X alternate position is to put
^ ^ the jumper in the upper position,
| | and then the USB interface is
| | powered by +5VSB, suitable for
v v USB keyboard wake from sleep etc.
X X

If you turned the jumpers sideways, like this X<-->X, between
columns of pins, that doesn't do anything to the circuit at all.
It is like "no connect" and USB receives no power at all.

I only recommend using the +5VSB jumper setting, for a pair of
ports that have devices used to wake the computer from sleep. Your
USB memory stick, for example, doesn't need power when the computer
is shut down, so the +5V setting would be suitable for the ports
used by the memory stick. If you have high power USB devices, they
can draw a lot of current from the +5VSB output of the power supply,
and some power supplies do not have a lot of current on this output.

Notice how USBPWR56 is a separate 1x3 set of pins, and that might
make it easier to understand.

That should at least get you power.

HTH,
Paul
 
Are you using the onboard USB ports? (On the backplate of the motherboard?)
Or perhaps you have mistmatched wiring on your case "front" USB port
extension.

Try loading the latest VIA Hyperion (4in1) drivers.
 
God bless you, Paul!!!!

It was exactly as you said. The jumpers were side by side = no power.
You solved the problem. Thank you so very much for your help.
It was one HUGE headache you took away.

Thanks again,

Andre
 
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