No crank, no start, security problem

A solidly lit security lamp on (not blinking). Several months ago the car sat idle and the battery drained. I jumped it, it started, and I drove it home. I went to start it again and I was greeted with the security lamp. I thought it might be the battery so (stupidly) I bought a new battery. Still did not start. This car is a push button start with 1-key and 2-fob's. Both fob's are recognized. I think this is a PassKey III configuration. I charged the battery to full and then I did a battery recondition with my CTEK Multi US 7002. Everything was fine. Then I tested the battery with my Solar BA9 tester. Again, everything was fine so the battery is not concerning me. I tried (multiple times) the thirty minute relearn process without success. I had the CTEK on the battery in "supply" mode during the relearn procedures to make sure the voltage did not drop. The dash goes black when I attempt to start. I turned the accessories back on and then (in the fuse panel, engine compartment, passenger side, front) I jumped the heavy gauge pink wire to the power and it cranked right up. After shutting the engine off the security will again take over and back to a no start situation. I am trying to avoid the dealer for a re-flash. They already told me $150.00 and it might not be the problem. I can almost guarantee they are going to try to hit me for a new Theft Deterrent Module (TDM), which, in this car, I believe is part of the body control module (BCM).