MS wheel optical mouse USB losing power

August 24, 2010 at 09:01:39
Specs: Windows 7 Ultimate 64-Bit/ and im running Windows 7 Ultimate 32-bit as my second os, AMD Sempron 3600+ 2.01GHz / 2 GB RAM
i have a microsoft
wheeled optical mouse and its been working fine for about a year now then all of a sudden it just started to turn on and off then finnally shuts off completly i thought it was just dying on me but i got me a new one just like it and it does the same thing i usually have to unplug it from the usb port and plug it back in any ideas and does anyone know a way to boost my speed on my usb ports (or increasing the power output through usb) oh the usb ports all work fine

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August 24, 2010 at 10:19:49
USB devices may not work correctly when they're connected to certain USB ports e.g. ports in a hub or on the front of a desktop case. If you have a desktop computer, you may have an IRQ sharing problem you need to fix, or your power supply may be starting to fail.
See response 3 in this:

You can have an IRQ sharing problem in one operating system but not in another one on the same computer.

Also - if you are using a USB extension cable that did NOT come with the device, some of them have inadequate wiring and will not work properly with some USB devices.

"....does anyone know a way to boost my speed on my usb ports (or increasing the power output through usb) oh the usb ports all work fine"

USB mice and keyboards use very little power, and they do not require a fast data transfer USB port spec - they will work fine with a USB port that supports USB 1.0 and up specs. (USB 1.0 specs are the oldest, slowest specs.)

That said, failing power supplies are common. If the PS can no longer supply +5v accurately and reliably, you can have problems with any device that requires accurate +5v - anything that plugs into USB ports, optical drives, floppy drives, PCI cards, etc., etc.

All USB ports directly connected to the mboard are supposed to be able to supply the max 500ma (1/2 amp) USB spec.


- there are a few laptop mboards that can't supply 500ma per built in USB port, but most if not all of those are on really old models.

- Rarely, not all the ports on the back of a desktop case may be able to supply 500ma each.

If you have a desktop computer, Note that I answered a Topic on this site recently where a guy had an external drive, which does require the full 500ma, connected to a port on the back of a desktop case - it would not work properly when a webcam was in the port next to it, but it worked fine when the webcam was unplugged. Ports on the back of a desktop case often have two ports connected to the same USB controller module that are ports one above the other - you could try connecting the cable to one of those and leaving the other un-used.

If a USB mouse or keyboard is directly connected via a cord, it's common for wires inside the cord to get broken, often right near where the cord enters the device, after the device has been used a lot, or at any time after the cord has been yanked on. If the insulation on the broken wire(s) is still intact and the broken wire ends can still touch each other, the mouse or keyboard still works, but the behavior of the mouse or keyboard will be erratic, and the symptoms MAY come and go depending on the position of the cord, or if you wiggle the cord, where it enters the device.
Try another mouse or keyboard in that case, or try the erratic mouse or keyboard with another computer.

Rarely, a USB mouse can confict with other USB devices. E.g. I have one Logitech combo USB / PS/2 model ( M-BJ58 ) Wheel Mouse (optical) that conflicts with one other USB connected device I have, yet it works fine when the USB to PS/2 adapter is used in a PS/2 port with it.
When both that mouse and the USB device it conflicts with are connected to USB ports, either one or the other works properly, never both of them.

You could try unplugging other USB devices to determine whether unplugging a certain USB device makes the erratic mouse behavior to go away. You may need to Restart the computer as well.
It would probably be something other than a USB flash drive it is conflicting with.


When you have a desktop computer, the first PCI slot of the PCI slots on the end closest to the middle of the mboard should not be used for any PCI card except a PCI video card. That PCI slot is forced to use the same IRQ as that of the video, and you're likely to have problems if you plug anything other than a PCI video card into it.

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