Sorry to hear about your trouble. When I first read your question, I automatically assumed it might have something to do with the mechanism (a latch or otherwise) which would let the computer know that the lid is shut and that it should go ahead and take a nap. While this still might be the case, there are apparently several people with similar problems so I am including a multi-step solution which will hopefully cover your problem.Step 1:Change your device settings:
WHY: Some devices are active - such as a wireless mouse, your network, or the HD audio - to wake or appear to prevent sleep mode. This is especially prevalent in regards to people who are always connected to their network since the advent of cable and DSL.
- In the lower left corner of the screen, right-click and select DEVICE MANAGER from the menu
- Click the arrow next to the device that needs to be adjusted. Since we\'re not sure which it might be, let\'s try a few of the more obvious solutions:
buggerou are using a wireless/optical mouse, select MICE AND OTHER POINTING DEVICES
* If the computer is left connected to the internet connection - or to be safe, if you are using broadband like cable or DSL, select NETWORK ADAPTERS
* To check the HD audio setting, click SOUND, VIDEO AND GAME CONTROLLERS
- Double click the name of the device and a PROPERTIES window will appear.
- If the Power Management tab is available, skip this step
If the Power Management tab is NOT available, click the CHANGE SETTINGS button. The same Properties window opens with Power Management tab available.
* Note: It may ask for an administrator password; this is normal.
- Click the POWER MANAGEMENT tab, and remove the check next to "ALLOW THIS DEVICE TO WAKE THE COMPUTER". I know it sounds tedious, but you may have to do this for each of the three devices I listed above (mice and other pointing devices; network adapters; sound, video and game controllers)
- Click OK, close all your windows, and restart the laptop using the windows + C keys which will allow the Charms menu to appear on the right of your screen. Click SETTINGS, then POWER, and finally RESTART
Check your connected devices.
Some devices can cause/sleep standby issues. Let\'s check to see if they are causing a problem.
- Disconnect all non-essential connected devices such as your printer, scanner, USB drive, etc.
- Restart the computer with only the original mouse, monitor and keyboard connected.
If the sleep/hibernate issue is solved, one of the connected devices was causing the problem. Replace each device one at a time until you find out which ****** was causing the problem.
Check for problems caused by using a keyboard or mouse in a USB 3.0 port.
When using 3.0 ports, some computers dont allow you to put the laptop to sleep using the keyboard or mouse. This usually only occurs on systems using AMD firmware so let\'s check and see if it might be the problem.
- Check the mouse and keyboard connections
- If a USB 3.0 port is being used, reconnect the device to a USB 2.0 port.
If this is the issue, you have two solutions: Avoid using your USB 3.0 ports for your keyboard and/or mouse OR go to the next step...
Since it sounds like the sleep and hibernate modes worked in the past, we can always resort to using System Restore to revert the computer back to a time when the mode worked. Obviously, if the modes have never worked, don\'t follow this step.
You can perform a System Restore from the CONTROL PANEL.
------If you are still having issues:
The list of possible reasons is practically infinite. I have listed the most common and their solutions above, but if they are not working, try:
* Disabling screen savers
* Preventing startup programs from opening
* Changing your power settings
* Upgrading the BIOS and keyboard software
I hope this works for you and if you have any questions, please don\'t hesitate to ask!