Roguetrader

I have a 1993 Nissan R33 Skyline GTST single turbo. I tried starting it the other day and it didn't want to start. I believe I may have an immobilizer problem. Usually, i have to press the combination on the keypad to start the car. However, the keypads aren't lighting up anymore. The keypad which is mounted just beside the handbrake and is not battery operated. It has a wiring lead that connects to a relay under the dashboard which is under the steering wheel. I used to be able to hear the fuel pump before I start it, but not anymore either. I check the fuel pump fused but it seems ok and no resistance. Is there a way to disable the alarm and immobilizer system at all? Does anyone have a similar setup? Any help would be much appreciated.