My Haswell Intel NUC Kit D54250WYK was running reliably on Windows 7.
Two weeks ago I installed Fedora 22 (Linux Kernel 4.0) on the NUC.
After installing the Fedora 22, the NUC went through several suspend-wake cycles without incident.
The power button would slow blink when suspend, and wake when the power button was pressed.
After a few days, pressing power button did not wake the NUC. But unplugging and replugging booted the NUC.
After reading https://communities.intel.com/message/286193, I updated the NUC firmware with WYLPT10H.86A.0040.BI.ZIP.
After installing the firmware, the NUC went through several suspend-wake cycles without incident.
Today my NUC would not wake.
The power button was slow blinking as expected.
I pressed power button several times, but it was unresponsive.
I hold power button down for 10 seconds; power button still slow blinking.
I unplug power, replug, and press power button; NUC does not power on.
The power button is lit dim green. The USB mouse LED is on.
The last thing I did before the last suspend was install s3cmd.
https://apps.fedoraproject.org/packages/s3cmd
Any suggestions would be greatly appreciated.