Perform the following actions between suspend and resume.
Remove and apply power while the system is suspended.
Add or remove the USB stick.
Add or remove the SD card, if applicable.
Add or remove the PCMCIA card, if applicable.
Turn on/off WiFi if possible while the system is suspended.
Unplug and plug in the projector.
Add or remove the firewire device, if applicable.
Each of these tests have two distinct steps.