Their recommended procedure is actually a bit different that that though...
Start your Pro Tools system in this order:
1) Make sure all your equipment (including your
CPU) is off.
2) For TDM systems with an expansion chassis, turn on the expansion chassis.
3) Turn on external hard drives, if any. Wait ap- proximately ten seconds for them to spin up to speed.
4) Lower the volume of all output devices, then turn on your Pro Tools audio interfaces.
5) Turn on any MIDI interfaces and devices, or synchronization peripherals.
6) Turn on your Pro Tools audio interfaces (such as 96 I/O). On power up, the status LEDs will flash. Wait at least fifteen seconds for the audio interface to initialize, and the status LEDs to stop blinking and stay lit.
If you launch Pro Tools without turning on your audio interfaces, you will be prompted to turn them on. Allow fifteen seconds for audio inter- faces to power-up and the status LEDs to stop blinking and stay lit, before clicking OK.
7) Turn on your computer.
For LE systems on Macintosh, if the Digi 001 is configured as a MIDI interface, make sure to launch Pro Tools before launching other MIDI applications, such as OMS Setup, and SampleCell Editor.
Once you have quit Pro Tools, shut down your Pro Tools system in this order:
1 Turn off your computer.
2 For TDM systems, turn off audio interfaces.
3 For TDM systems with an expansion chassis, turn off the expansion chassis.
4 Turn off any MIDI interfaces and devices. 5 Turn off external hard drives.