Was there any problems with the connectivity before the power supply crashed? Please list your Computer specs, and when you purchased it. Do you have antivirus software? What operating System? Desktop or laptop? What brand of router are you connecting to? Based on the description of what you have to do to fix the connectivity problem, I am thinking it is software/driver related. When you reset your pc or manually disable the connection and re-enable it, you are forcing it to establish a new connection to your router, getting a new ip address, what it should be doing already. Do you run system/windows updates? If the cable works on other computers but not your ethernet connection, then your network card is not functioning properly, either a bad driver, or update of some sort, unless it has failed completely. The date and time problem sounds like it could be related. I need to know your pc specs before I can add more ideas about the problems. Im a computer technician, so I want to help.