You don't "think" a part is bad...you check it for continuity or for power going to it. "Thinking" can get you a lot of wasted parts
The touch pad is only a set of switches, easily checked with your OHM meter as long as you read the manual to show you which terminals to check. The door switches are also a simple switch, one for L1 the other for Neutral.
Do you own a meter? Please answer the question...thanks.