Originally Posted by 70GT6
Could still be the battery.
The alarm has it own battery back up.
Does the engine turn over? Head lamps turn on?
Also, you can check the battery in the fob by pressing both buttons at once (and hold) you can then see a light blink through the window on the end of the fob.
Thanks for your quick reply mate.
Engine did attempt to turn over but wouldn't fire due to the immobiliser.
The Red Led light did blink faintly so wondered if a flat battery would give a weak signal to the transponder.