I have ENSHU DT- VMC with Fanuc o-m. Recently in the morning when trying to turn the machine ON at the head unit it will not startup right away.The machine will not boot. No Display on CRT. We have to swich ON & OFF Mains several times. After half an hour to 45mins it starts booting and works fine. I have found no 24 v at display power in. Anyone have any idea as to why it won't turn on right away anymore?