How to fix my lenovo laptop r61?

How to fix my lenovo laptop r61?!

Added (1). Well it goes to sleep mode RANDOMLY! Example: when i chat on skype, when i play on virtual worlds… And etc?! IS THERE A Way I CAN FIX IT. I KEEP HAVING THIS PROBLEM…

Added (2). Well it goes to sleep mode RANDOMLY! Example: when i chat on skype, when i play on virtual worlds, watch videos on youtube… Etc… IS THERE A Way I CAN FIX IT. I KEEP HAVING THIS PROBLEM…

The only way notebooks go into sleep mode is if there's a trigger to do so. If you aren't specifically telling it to go to sleep… Then a closed lid or battery level might be to blame. We would actually have to see the machine to tell you more… Take a video of the problem and post again.