When a PC won’t restart, suspend, sleep, or hibernate properly, how to find and fix what’s wrong.
Plus: Understanding the system-folder name changes between Win XP and Win7/8, and using an Android .iso to boot and run your entire PC.
Personal computer won’t wake from sleep mode
Reader Bob Gellman’s PC won’t restart without a full power-off cycle. It also shows unexpected wake/sleep activity.
- “Hi, Fred. I have a Sony Vaio all-in-one running Win 8.1. I can’t restart it — it just hangs. For a successful boot, I have to turn it off entirely and then turn it on. Its normal restart capability [from sleep or hibernation] disappeared at some unknown time.
“How do I go about diagnosing this problem and — better yet — fixing it? Going back to an earlier configuration just doesn’t seem practical. I’ve already spent more than 50 hours (not all at one time!) setting up and configuring the machine to my liking.
“One possibly relevant observation: If I hibernate the machine, it seems to wake up on its own in the middle of the night. I’ve nothing scheduled to run then — or at any other time.”
That combination of issues sounds like a problem with your PC’s power state–management subsystem. Something’s not responding properly to power-down commands and something else is causing the unexpected wake-ups.
Windows typically supports system power states that are defined by the Advanced Configuration and Power Interface (ACPI) specification. You’ll find specifics on the ACPI site, but Wikipedia’s explanation is somewhat more digestible.