On Tuesday, January 22, 2013 at 11:23:54 AM UTC-5, Art Harris wrote:
About two years ago, my daughter gave us a La Crosse Indoor / Outdoor
weather station (Model 8300) with an outdoor sensor/transmitter unit.
It worked perfectly until recently, and we've become addicted to it.

Two days ago, the outdoor readings disappeared. I replaced the
batteries in both the indoor and outdoor units, following the
procedure in the manual, but cannot get any outdoor readings.

Would welcome any helpfull hints or recomendations for a similar
weather product.

Thanks,
Art

open up the transmitter
clean the curcuit board with a paper towel
THERE IS SOME WHITE POWDER ON THE TERMINALS BEHIND THE JACKS
Clean off the corrosion and any bugs that have got inside
Clean the inside of the jacks
Shold work now