My instrument cluster would intermittently stop working for a few minutes or several hours. Now it has stopped altogether. Radio and temperature controls work fine. The Inifiniti mechanic thinks it is the bulbs and wants about $500 to see but that might not be the problem. It could be the entire cluster. My concern is that it doesnt seem likely for bulbs to go on and off intermittently (dont they work on a filament which would be broken or not?) and that it is something electrical. I dont want to pay that kind of money for, "oh thats not it, lets try something else, oh thats not it.....". Would love some advice/input.