Hello Ian Blackburn.
I am sorry you are having that issue. It sounds like it might be a software issue, however there are a few things I would recommend before contacting the Technical Customer Support Team.
First, the settings on your Surface with Windows RT allow you to choose what the device does when you close the cover or press the power button. You will want to double check what your settings are set as currently.
To do this:
- Swipe for Charms
- Type "Power" in the Search
- Select "Power Options"
- Select Choose what closing the lid does or Choose what the power button does
If making adjustments to your settings and restarting your Surface have not fixed the issue, you will want to try a refresh or a reset.
Refresh your Surface
Refreshing your Surface re-installs Windows while keeping your personal files, settings and any apps that you have installed.
1.Swipe in from the right edge of the screen, tap Settings and then tap Change PC settings.
(If you're using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, click Settings and then click Change PC settings.)
2.Tap or click General.
3.Under Refresh your PC without affecting your files, tap or click Get started.
4.Follow the on-screen instructions.
Reset your Surface
ImportantAll of your personal files will be deleted and your settings will be reset. Any apps that came with your Surface will be re-installed, but all other apps will be removed. However, your apps can be easily re-installed using the steps below.
- Swipe in from the right edge of the screen, tap Settings, and then tap Change PC settings.
(If you're using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, click Settings, and then click Change PC settings.)
2. Tap or click General.
3. Under Remove everything and re-install Windows, tap or click Get started.
4. Follow the instructions on the screen.
Note You'll be prompted to choose whether you want to erase data quickly or thoroughly. If you choose to erase data quickly, some data might be recoverable using special software (not included with your Surface.) If you choose to erase data thoroughly, this
will take longer but it makes recovering data far less likely. After your Surface is reset, re-install your other apps using the following steps:
- From the Start screen, tap or click Store.
- Swipe down from the top edge of the screen (or right click your mouse), and then tap or click Your apps.
- Swipe down on or right-click to select the apps you want to install, and then tap or click Install.
If you have completed all of these steps, and still having trouble with your sleep function. You will need to contact the
Technical Customer Support Team or you can do this yourself by creating a
Service Order.
I hope this helps! Let us know if you have any more questions!