acls400

Hi all new to the forums. i have a 1990 ls400 that has a a/c gas leak but the wierd thing is that the a/c lights including the recirc and fanon the centre console flicker on and off randomly in unison. is this the result of a gas leak or is it due to something else? the radio and cd buttons works fine on the centre and are not affected. im thinking it could be a grounding problem any help would be apprieciated. also hats the best way to find the source of the leak?