What are some examples of computer peripheral devices?

keyboard
mouse
touchscreen
pen tablet
joystick
MIDI keyboard
scanner
digital camera
video camera
microphone

external hard drives
media card readers
digital camcorders
digital mixers
MIDI equipment

How do you troubleshoot a peripheral using only a USB port?

 First, try the obvious: unplug the USB device and plug it back in. Wait five minute and see if the USB peripheral installs correctly this time. Next, try rebooting your computer and trying again.

Some common output devices include:

monitor
projector
TV screen
printer
speakers

etc