are you kidding?..... very short infomation!! Any way, this can be caused by number of things,( e.g Power supply, Motherboard, CPU, memory or any other add device) Turn OFF your computer Open its cover, remove all attached device from the Motherboard (Memory, CPU, Cards, Drives etc) leave the power supply connected Turn you computer ON, if the Orange light stays blinking, then either Power supply or Motherboard is Bad If the Orange light goes OFF, then you have a bad device in your system Turn your computer OFF start adding you device one after another noting which will cause problem!!