[questions]

my computer is in a sleep mode and i can’t wake him up. I pressed a key and mouse but nothing happened. When I turn my computer on it beeps and goes onto Windows…then appears a black screen with the message “Attention” Entering sleep mode” and my computer starts again…then it beeps, goes onto Windows and the message appears again and my computer starts again…and again…can anybody help me? I went to a computer shop but the men said…just buy a new computer…?!