I have a computer with ECS nforce3 1.0A motherboard. There are 4 usb ports on the mobo and I have 2 usb ports in front of the computer attached to the motherboard with cable. Some weeks ago I formatted the computer and re-installed win xp sp2. I believe everything worked fine after that (I have moved and not used the computer much during the move so I am not sure) but suddenly the usb ports do not work. The devices get power from them, but windows do not react at all. I have tried a wireless network card for usb, a printer and a usb pen. All the devices work on my laptop.
I have updated the BIOS, tried to uninstall the usb ports in device manager and reinstalled them. I also tried installing Vista to see if that helped, but nothing seems to do the trick. I would really appreciate any help here since this is driving me crazy.
An expert who has achieved level 2 by getting 100 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert whose answer got voted for 100 times.
Re: USB ports suddenly not functioning
I think installing the proper drivers for your motherboard and operating system should work. Find your drivers here (scroll down to see the available drivers and make sure you install the drivers for your operating system) or on the cd that belongs to your motherboard.
Hi, see if you have installed any new devices/hardware to see if its conflicting, often grafics cards conflict usb devices, also just check that in the setup(when you boot up)that the usb ports have not been disabled or usb keyboard support hasn't been enabled/disabled. good luck!!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Unlikely to be issues with the OS. Have you recently upgraded to Win 7 from Vista or XP? and did the USB ports work with this OS? Do ALL usb ports fail or is it just one or two and are these the front USB's or rear USBs?
/* Style Definitions */
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
font-family:"Times New Roman";
Simply UNPLUG YOUR COMPUTER FROM THE POWER SUPPLY. Yes
that’s it! Note that this does not mean just turning off your computer because
modern computers don’t really turn off when you press the power button as the
motherboard still gets power.
The motherboard is where all of hardware of the computer
is connected to, including the USB ports. Sometimes the motherboard needs to be
“rebooted” also because something can go wrong, i.e. all your USB ports
suddenly stop working. The small microprocessor on the motherboard will reload
the drivers and your USB ports should be back to recognizing all devices!
So first turn off your computer using Shut Down or pressing the power button
and then UNPLUG it from the wall outlet. Let it sit for about a minute and then
plug it back in. (VOILA)
This is a USB problem. The pc is telling you that your device will work better if you connect it to a USB 2 port.
Make sure that you have your USB 2 drivers installed. They usually come on the setup disc that you have with your motherboard. If not, use free 'cpuz' program (google it) to determine your motherboard type/serial no, then search for 'usb 2 driver for 'insert your board serial' mobo.
that looks like an Albatron MoBo but I cant get onto the albatron website to confirm this
AMD Athlon™/Athlon™XP/Duron™Processor Socket 462 with FSB 200/266MHz 2 DDR266/200 Memory Sockets 6channel AC 97 Audio 2 ATA133 Channels, up to 4 ATA 133 IDE Devices 6 USB 2.0/1.1 Ports (4 ports by optional cable) Integrated 3D Graphics Engine
Socket 462 AMD Athlon™/Athlon™XP/Duron™Processor
FSB / Transport
North Bridge: VIA KM266 ( VT8375 ) South Bridge: VIA VT8235 I/O Chip : Winbond W83697HF
2 * DDR sockets DDR266/DDR200 unbuffered ECC/none-ECC DDR SDRAM up to 2GB
1 x AGP 4X slot (1.5V Only) 3 x PCI slots (PCI 2.2 compliant) 1 x CNR slot (AMR Type)
IDE / SATA Connectors
2 ATA133 channels, up to 4 ATA 133 IDE devices
Onboard I/O Connectors
1 x Floppy Connector 2 x USB 2.0/1.1 header (4 ports USB cable optional) 1 x CD_IN header 1 x COM (serial) port header (Optional COM cable) 1 x S/PDIF in/out header (S/PDIF in/out cable optional) 1 x CPU fan header with fan rotation detection function 1x System fan headers with fan rotation detection function 2 x 5 pin system panel header (Intel spec) 1 x Front audio header (Intel spec) 1 x IrDA header 1 x Case Open detection header 1 x Wake on LAN
I/O via Back Panel
PS/2 keyboard/mouse, 2 x USB(2.0/1.1),1xVGA ,1 x Com(serial), 1 x Parallel, 1x Game/Line-in/Line-out/MIC
20-pin ATX power connector
2Mb Flash EEPROM Award BIOS with ACPI, DMI2.0, PnP, WfM2.0, Green Suspend to RAM (S3), Suspend to Disk (S4) Wake on keyboard, Wake on LAN/RTC Timer
2 FAN sensors, CPU/System voltages and temperature monitoring.
Like always I'm sorry for I have to be the one who's giving the bad news. The problem you face is related to a complex issue with the keyboard and mouse receiver electronics. More precisely these devices emulate a standard ps2 interface but adapts it to work with a usb port. This emulation should work fine but has some limitations. A motherboard has some 2-4 usb main ports that can be hard wired to some 1-2 usb hubs mounted also on the motherboard. A urb hub has the advantage of replicating a usb port so more then 1 devices can be connected at the same time, sharing the same interface. Motherboard manufacturers use this to enable their products to have more usb ports available to the user. However there are some devices that aren't compatible to be used through these usb hubs and must be connected directly to a usb port in order to use the full bandwich. Wireless keyboards and mices, or usb to ps2 adapters are such examples. As hard as you may try these woun't work untill you replug them at every restart because they can't be properly initialised through a usb hub. most of these devices have been optimised for such uses and don't display such problems, but as you see not all of them. The only solution in your case would be to change the usb port where you plug these devices. Maybe your motherboard has some 1-2 usb ports that aren't run through a usb hub. Those ports would work fine. If this doesn't help, then there's no other way to make those 2 devices more "compatible" to eachother.
Hope you'll be lucky with finding the right usb plug in your motherboard. Just try every one of them, reinstall the drivers if needed, and check to see if this solves the problem.