I've had this wireless mouse for 3 months (microsoft wireless mobile mouse 4000). it just stopped working. the battery is fresh (the red light is still on) and the transmitter is still firmly in the usb port.

Push the little red "connct" button on both the bottom of the mouse as well as the wireless receiver. If that does not work try referring to the quick start guide here.

I use rechargeable batteries rated at 3200MAh and have been operating for 2 months now.

If you can't get hold of them, try fresh Alkaline batteries like Duracell.

pls. vote for better service... thank you

Chances are that the keyboard is too far away from the receiver. This will wear the batteries down very fast. Optimal distance is less then 3 feet away unobstructed. try this and you shouldn't have many problems anymore.

try to look at if you plugged it properly. or bring it where you bought it and ask your question to them

Just to clarify, this is a wireless optical mouse, right? Please try the steps below:

1. Use fresh batteries.
2. Make sure that the mouse is turned on.
3. Check if there's a connect button on the wireless receiver and underneath the mouse. If there is, try holding down the two connect buttons at the same time for five seconds and then release them both.
4. Try moving the mouse.
5. Make sure that there are no possible wireless interference between the wireless receiver and mouse like the base of a cordless phone, cell phone etc.

If same problem occur after doing the steps below, then you may want to contact the manufacturer for RMA. This Microsoft 4000 has a three year limited warranty.

Thank you!

The red laser light stopped working on mine and it turned out to be the connetion between the battery tray and the circuit board. There is a metal tab on the circuit board and a matching one on the battery tray. When the battery tray slides in correctly the two tabs touch and viola (!), my red laser light came back on. Maybe one tab or the other got bent when I slammed the tray in crooked when replacing a battery- who knows.

What is the exact model of wireless mouse you have? You may have a laser wireless mouse, which may not emit any visible light. The red light on other wireless mice are either a different optical mouse technology, or a red light for the purpose of being pretty. Not all wireless mice have a red light that you can see. Does the mouse work (regardless of the light)? Have you hit the connect button? Have you connected the wireless receiver to a working USB port?

Try to take off battery and next push and hold down the small button that protrudes where the receiver is placed in the mouse, put back battery and simultaneusly release the button,it might make the mouse operate correctly. Good luck!!!! Chawah.

Normal 0 Turn the mouse over and find the small rest/connect button on the bottom of the mouse and press it to Reset/Connect the mouse to the receiver and work properly.
If not, try pressing the receiver button and then press the mouse. This should be done whenever you change batteries or glitch.
Hope this helps you. Bud

Try fresh battery and if one on the pack doesn't work, try another --make sure the batteries are NEW and scrape contacts in mouse with emery board a bit and blow out sand --contacts can oxidize.