I've had my DS 7000 for 10 yrs now, the
base unit is very durable. I've upgraded
the system from the original 9volt sensors
to the new door/window & motion sensors
with no problems.
It appears your system has lost the codes
for the sensors. A good way to check is to
move the switch in the upper right corner
to the "install" mode - if none of the zone
lights come on then your entire system
needs to be re-initialized (including the
remotes). Re-initialize your system the
same way you first did.
If some of the zone lights go on when you
move the sitch to "install" then change
batteries on those that do not and hit
the "test" button to reconnect. Lastly
with the switch still in "install" mode you
need to press a button on the remote to
reconnect it to the system. Your recorded
message and programmed phone #'s should be
OK, but I recommend you redo those anyway
(better safe than sorry).