8 dead Intermatic Timers

[bob <bsmall69@xxxxxxxxxxx>]

I bought 8 model DT121 timers for our indoor christmas trees and
displays last year. One of them I continued to use past christmas and it
stopped working a few months ago. I figured it was dead batteries, even
though the time was still working and it did not say LO on the display.
It would only stay on and would not turn off at all, even though the
display cycled through ON and OFF. All other 7 timers were stored in the
attic in a zip loc, with all the batteries removed and stored in another
zip loc bag along side them. I plugged them in a week ago and they all
worked, even though one said LO on the display, it still functioned
properly. I went out of town for a couple days and found that all 7
remaining timers were dead. None of them turn on or off. I bought new
batteries at Radio Shack, even though the time display was still
functioning, thinking it was just time for new batteries. Guess what,
they still don't work. I also tried the reset button just above the
battery compartment, but no difference. These are not exactly the
cheapest timers out there. Is there a fix? or are they complete trash
now? I dont have the packages or I would just exchange them at Lowes
where I boutht them since you would figure that a timer should work for
more than 10 months, 8 of which were in storage, unused.

any solution?
Thanks, Ron