NBC's brief blackout during the Super Bowl was due to an “equipment failure”

The Super Bowl briefly went dark tonight after what NBC has attributed to a "brief equipment failure" during a commercial break in the first half. Instead of any ads, viewers just saw a black screen.
NBC claims that no commercial time nor game time was missed. If it had lost ad time, the seconds could have cost millions of ad dollars, considering a 30-second spot has been quoted to cost $5 million.
From NBC Sports spokesperson:
"We had a brief equipment failure that we quickly resolved. No game