ℹ
info HP
Status LED is off (S5)
System in Hibernate mode or system powered-down properly.
? What Causes This
Operating System entered hibernation state due to lack of activity.
ⓘ What This Means
Restore normal operation by pressing power button or allowing re-activation on schedule.
Source: page 27 of the official manual
From the manual
This error code appears in:
HP Compaq Pro 6300 SF Desktop