Many Asus laptops (including the 502la, of which we have several) have a weird quirk when they're running Windows 10. Here are the symptoms: if you close your laptop, or walk away from it and allow it to go to sleep, you won't be able to wake it back up. You can open the lid, jiggle the mouse, type on the keyboard, or tap the power button...nothing will happen. Your machine will stay snoozing soundly as if it was Sleeping Beauty. The only way to resolve this issue is to perform a hard reset of your computer by holding down the power button for 5 seconds, then turning your machine back on.
Thankfully, there is a better way to stop this issue from happening in the first place. The going-to-sleep-and-not-waking-up problem is tied to a piece of software called the Intel Management Engine Interface. If you disable this piece of software, your computer will wake up from sleep normally. Here's how:
1. Right-click on the Start Menu, then choose "Device Manager" from the Quick Links menu. If you're into keyboard shortcuts, you can also type Win+x, then the letter 'm', which will do the same thing.
2. Scroll down the list of devices until you see "System Devices". Click on the chevron to expand this list.
3. Find the Intel(R) Management Engine Interface. Right-click on it and choose "Disable" or "Disable device".
That's it. You don't have to restart your computer, the changes will go into effect immediately. To test if the fix was effective, you can close the lid of your laptop, wait a few seconds, then re-open the lid. Your screen should flicker back to life.
Note that major Windows Updates may reset this Management Engine Interface back to its default setting (enabled), which will cause the not-waking-from-sleep problem to return. If that happens, it's a simple matter to follow the steps above to disable the Management Engine Interface again.