Hi Richard,
There are a lot of possible factors for this matter to occur. One possibility is that the advanced power options were reconfigured. To isolate this matter, we have some questions for you:
- Have you checked your screensaver if it is set to blank?
- Have you tried checking the Advanced power options, under sleep mode if it is set to "0" or disabled?
- What troubleshooting steps have you done so far?
We recommend that you go to Control Panel > Hardware and Sound > Power Options > Change Plan settings > Change advanced power settings > locate Sleep. Under Sleep after and Hibernate after, set it to "0" and under Allow hybrid sleep, set it to "Off".
We'll be waiting for your response.
Regards.