Diane,
 The white substance you see is due to batteries leaking, due to not being removed when discharged.
I would try scraping the contacts in the battery compartment with a knife blade to restore a good shiny connection, then removing the white residue with a mild solvent, which may put your mouse back in operation.
HTH,
Hal Seabolt 
  ----- Original Message ----- 
  From: D Duncan<mailto:[log in to unmask]> 
  To: [log in to unmask]<mailto:[log in to unmask]> 
  Sent: Saturday, November 05, 2005 2:41 PM
  Subject: [PCBUILD] Optical wireless theory


  Will my Logitech Optical Wireless mouse work with a different
  Logitech Optical Receiver and Laptop?

  My step-dad has a Logitech wireless keyboard and mouse with a
  receiver.  We got the receiver to talk to the keyboard, but it won't
  hook up with the mouse.  We've put in new batteries in the mouse, but
  the bottom of the mouse is all corroded and has white powdery stuff
  on it and that's where the batteries are housed.  As well, the
  mouse's red optic light flickers, but I'm not sure what that means.

  If this mouse is truly ready for burial, will any wireless Logitech
  mouse work with his setup?  Or will he need to get a new trio of
  peripherals (mouse, keyboard, receiver)?

  Thanks,
  Diane

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