Solved! Do laptops have ATX?

[s355]

If not, how does it turn off its internal parts at shutdown?

 

[AlHuneke]

I don't understand you question. ATX is a standard for PCs and PC power supplies. No relationship to laptops that I'm aware of.

 

[s355]

I don't understand you question. ATX is a standard for PCs and PC power supplies. No relationship to laptops that I'm aware of.

I'm wondering how laptops turn themselves off after shutdown.

 

[AlHuneke]

There are hardware registers that are controlled by software that interface to the power supply to control that.

 

[s355]

There are hardware registers that are controlled by software that interface to the power supply to control that.

You mean a power supply built into the motherboard?

 

[USAFRet]

You mean a power supply built into the motherboard?

For a laptop, the "power supply" is external. The little brick thing.

The circuitry on the motherboard does mostly the same things as a regular PC power supply does...distribute the various volt/amp/watt requirements to the proper components.

 

[AlHuneke]

Every laptop has an internal power supply to produce the internal voltages needed by the machine. For example, the 1.5 VDC (or whatever) to power the CPU. All the "brick" does is charge the battery and supply power to the internal power supply while the battery is charging or charged. Think of it this way:

• The internal power supply powers the CPU, GPU, display and other circuitry.
• It receives "raw" (different voltage) power from the battery and/or the external "brick".
• The power supply decides where to draw power from and charges the battery when it can (a little like a hybrid car does).
• The power supply creates the reset signal needed to initialize all the digital circuitry on startup.
• The power supply monitors operations and (usually) shuts down the machine in an orderly fashion if the battery is getting too low on charge with no external power.