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The standard defines how to signal the H-sync and V-sync pins in a standard SVGA monitor to trigger the monitor's power saving capabilities. DPMS defines four modes: normal, standby, suspended and off. When in the "off" state, some power may still be drawn in order to power indicator lights. The standard is:
DisplayID, display identification data format, which is a replacement for E-EDID; VESA Display Power Management Signaling (DPMS), which can be used to invoke power saving modes in monitors; Digital Packet Video Link (DPVL), a display link standard that can be used to update only portions of the screen
Intel Display Power Saving Technology or Intel DPST is an Intel backlight control technology. Intel claims that display take up most power in mobile devices and reducing backlight linearly affects energy footprint. Intel DPST technology aims to adaptively reduce backlight brightness while maintaining satisfactory visual performance.
Advanced Configuration and Power Interface (ACPI) is an open standard that operating systems can use to discover and configure computer hardware components, to perform power management (e.g. putting unused hardware components to sleep), auto configuration (e.g. Plug and Play and hot swapping), and status monitoring.
Burn-in on a monitor, when severe as in this "please wait" message, is visible even when the monitor is switched off. Screen burn-in, image burn-in, ghost image, or shadow image, is a permanent discoloration of areas on an electronic visual display such as a cathode-ray tube (CRT) in an older computer monitor or television set.
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These power supplies were generally not capable of power saving modes such as standby or "soft off", or scheduled turn-on power controls. Due to the always-on design, in the event of a short circuit , either a fuse would blow, or a switched-mode supply would repeatedly cut the power, wait a brief period of time, and attempt to restart.
The POWER command is used to turn power management on and off, report the status of power management, and set levels of power conservation. It is an external command implemented as POWER.EXE. [24] The command is available in MS-DOS versions 6 and later. [1]