Since a few days I'm noticing my CPU Casing LED(the system power LED) dimming. Some times it's so dim that it's hardly be seen, again sometimes they're bright enought). I opened motherboard and reconnected all the front panel connectors properly.but nothing changed.Besides I'm also noticing electricity voltage "up and down" in my room. May this voltage "up-down" be the cause of this?? or it's the fault of my motherboard? I'm afraid as it's my new PC..Thanks in advance.