I have already searched and read through pretty much everything I could find on the immobilizer issue but none quite matches my exact issue or I would appreciate it if someone could help pinpoint the issue based on my symptoms.

My 2000 Acura TL was working perfectly fine, I parked it during the holidays and when I went to start it, the battery was dead, so I tried to jump start it, when I hooked up the jumpers, the car's alarm went off as normal, I used the key to unlock the car in the driver's side door and turned the alarm off. Unfortunately the battery was far too dead, so I just took it out and went to exchange it for a new one. When I plugged up the new one, I didn't hear any alarm so I thought that was strange, but everything seemed to work, but when I put the key in, the green key light just keeps blinking and of course it just cranks but won't start.

Anyone have any ideas?