1988 Chrysler New Yorker Message center not working?

the message center in my car keeps reseting itself every time I turn on my car. the seatbelt light won't go off when i'm wearing my seatbelt. the message center also keep giving me phony messages such as "door open, trunk open, check engine, and 0 miles to empty" when none of these things are true. does any one know how this can be fixed, or if i can do it myself?