Pioneer VSX-2021 - Manual (Page 25)

En 25
03 Connecting your equipment
2 Plug the other end into a power outlet.
! After this receiver is connected to an AC
outlet, a 2 second to 10 second HDMI
initialization process begins. You cannot
carry out any operations during this process.
The HDMI indicator in the front panel display
blinks during this process, and you can turn
on this receiver once it has stopped blinking.
When you set the Control with HDMI to OFF,
you can skip this process. For details about
the Control with HDMI feature, see Control
with HDMI function on page 45 .