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Troubleshooting
Symptom Probable Cause Solution
Mouse Not Detected
If lens is not
illuminated red:
If green light
on receiver
does not blink:
Computer ports are improperly
set up (for example, are
disabled).
Confl icts among other devices
connected.
Installed on an incompatible
operating system.
No power.
USB receiver not recognized.
Check with your computer system dealer or
manufacturer if you need help.
Resolve any confl icts among devices connected to
your computer.
Compatible operating systems for the 3M
Ergonomic Mouse EM550 are listed on page 2.
Make sure the power switch is ON.
Use fresh batteries and install them properly.
Make sure USB receiver is attached properly to
your computer.
Reconnect mouse to your computer by following
steps in Part 2 above.
Cursor Does Not Move
At All
Mouse not detected.
Optical sensor may be blocked
by dust, dirt or crumbs.
Mouse is on an
incompatible surface.
See “Mouse Not Detected” above.
Blow or brush the obstruction away with a soft
cloth. However, do not insert hard objects through
the opening.
DO NOT use your mouse on a transparent surface
like glass or a refl ective surface like a mirror; on a
rough or porous surface that is not smooth; or on
a surface with complex graphic and color patterns.
Diffi cult To Control
Fine Cursor Motion
You are using larger muscle
groups to move the mouse.
It can take up to a week to train new muscle
groups to mouse and gain fi ne cursor control.
Slow down the pointer speed or acceleration in
your operating system’s mouse utility software.
GB-12