Net problem


it all started 3 daz before.. on a rainy day.. i left my system on stand by and went out... i think power had gone.. the next when i tried to connect internet its showing cross mark. i thought its cable problem. later i found the network adapter disappered and change adapter settings folder was empty.. changed os and done some other stuff and while installing lan drive its apperaing as "deep sleep mode.. connect cable".. finally given for servicing. that guy said its port problem and given a cable.. but the problem wasn't solved.. later i again re installed the lan drive and unchecked the power management boxes.. it got connected.. suddenly after sometime it automatically restarted.. again same thing..