NEED HELP!!!!

[vantec89]

ok last night my comp was running fine then this morning when i woke up it was in sleep mode. when i went to move the mouse to wake it up nothing happened. so i had to hard restart it and as soon as i put in my password it went to sleep. so i then hard restarted again but pulled the ethernet cable out and it was fine. after everything was booted up i plugged the ethernet back in and it immediately went to sleep. can someone please help?